Exeley Inc.

Mgbachi, C. A.

International Journal of Advanced Network, Monitoring and Controls      Volume 06, No.01, 2021 
DOI: 10.21307/ijanmc-2021-004                                                               24 
Performance Analysis of Heat-Based Smart Phone 
Charger 
 
Mgbachi C. A.  
Electrical Engineering Department 
Enugu state university of science and Technology  
E-mail: cysmart20007@yahoo.com 
 
 
 
Abstract—Smart phone services have become all 
encompassing in these modern life activities. These 
phones operate with batteries that provide the necessary 
electrical power. The batteries’ stored energy often got 
used up; and the conventional electrical power charging 
sources like public power supply, generating sets, solar 
devices among others are not only unreliable but most 
times totally unavailable in some villages and camp 
settlements. There was then the need to produce simple, 
inexpensive and easily accessible battery chargers for 
the phones. This paper therefore studies and analyzes 
the performance of a locally-made, off-grid and 
renewable energy power phone charger. The device 
output voltage, current and hence power has been tested 
at varying degrees of temperatures. Finally it was tested 
with different heat sources like, charcoals, Gas- burner, 
kerosene stove, wood stove, and Camp and Barbecue 
fires for heat source efficiencies. The results prove that 
charcoals and gas-burner heat sources are the most 
efficient heat source for operating the heat-smart- phone 
charger.   
Keywords-Smart Phone; Thermoelectricity; Barbecue; 
Seebeck Effect; Nano-Technology 
 
I. INTRODUCTION 
Ideally, the basic necessities of life are food, 
clothing and shelter. However, civilization, 
modern-life style and technological developments 
have forced some other necessities like Phone 
services onto mankind. In many rural areas of 
Africa and other developing countries of the world, 
peoples try to manage their lives without some 
amenities like electricity and sanitation, Nuwayhid 
RY etl (2003). Many of them find it difficult to do 
without Phones. Phones are fast becomming 
indispensable companions to both the urban 
dweller, rural and nomadic group of the entire 
populace. The simplest of these phones has 
important features like touch-lights, radio reciever, 
time piece, mailling facilities apart from the 
normal making and answering voice calls. These 
Phones are powered by batteries which need 
recharging on regular basis for optimum 
operations. In order to recharge these phones 
batteries, people do walk for miles to some 
common cell phone battery charging centers. “The 
upgrade technology system on cell Phones today 
makes life easier for everyone in rural areas but 
our major challenge is when it comes to charging 
them in the villages we have little or no electrical 
power supply,” says one irritated rural customer. 
(Susan P. Wyche, 2007). Some people who are 
tired of searching for opportunities to charge their 
phones just lose interest completely and eventually 
they will find out their “SIM” cards are de-
activated as well. This is one of the last conditions 
the telecom industries will allow…… losing a 
networked customer. 
Alternative electrical power sources like car 
batteries; diesel generators, solar installations and 
entrepreneurial charging kiosks do exist, but all 
have peculiar limitations.  Most of them are 
expensive, inconvenience and required 
maintenance and hence becomes unaffordable or 
even unavailable. In other cases hunters, hikers, 
mountain climbers and backpackers in the bush 
always move with smart phones that are equipped 
with some other electronics gadgets. These 
gadgets are powered up by batteries to keep them 
running and so need electricity to charge up the 
batteries. Spare batteries and solar chargers often 
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International Journal of Advanced Network, Monitoring and Controls      Volume 06, No.01, 2021 
25 
being used to support are often been used up and 
the sun rays are very weak or even unvailable for 
the solar chargers. Other alternatives are either too 
expensive or impracticable in such rural and 
outdoor areas. This necessitated the use of heat-
based smart phone charging system. This heat-
based charging gadget utilizes heat from heat 
sources like, charcoals, Gas-burner, kerosene 
stove, wood stove, and camp and barbecue fires.  
II. REVIEW OF RELATED LITERATURE 
This heat-based charging gadget avails phone 
users with a local technology for charging phones. 
It harvests and converts these heats to provide the 
required electrical energy to charge phone 
batteries.  This device harvests and directly 
converts these heats into electrical energy to 
charge our phones. This device works with the 
principle of thermoelectricity. Thermoelectricity 
means the direct conversion of heat into electric 
energy (Rowe DM, 2006). A thermoelectric power 
generator is a solid state device that provides 
direct energy conversion from thermal energy 
(heat) due to a temperature gradient into electrical 
energy based on “Seebeck effect”. The 
thermoelectric power cycle, with charge carriers 
(electrons) serving as the working fluid, follows 
the fundamental laws of  thermodynamics and 
intimately resembles the power cycle of a 
conventional heat engine. The heat collector here 
is an arrangement designed to collect and transfer 
heat from the heat source into the system. In order 
to optimize this heat collection and transfer 
process, aluminum sheet is used to fabricate the 
concave heat transfer base.  This plate collects as 
much heat as possible from the cooking stove, 
wood or gas while the blade can be pushed into 
the fire flames for better heat collection and 
transfer. This physical phenomenon where 
materials develop an electric potential due to 
temperature difference is known as thermoelectric 
effect Riffat SB, Ma X, (2003). Here, the 
thermoelectric modules are positioned in-between 
the heat harvester. The temperature differences the 
hot and the cold sides of the heat harvester 
produce some quantity of electricity. 
Thermoelectric modules simply convert a 
temperature differential across the device, and 
resulting heat flow through it, into a voltage via 
the Seebeck effect. The polarity of the output 
voltage is dependent on the polarity of the 
temperature differential across the thermoelectric 
modules. Reverse the hot and cold sides of the 
thermoelectric modules and the output voltage 
changes polarity.  
III. METHODOLOGY 
In this paper, we are looking at harvesting and 
directly converting heat into electrical energy 
enough to charge our smart-phones batteries. 
Many thermoelectricity developers have produced 
different kinds of power supply units using this 
same principle Weiling L etl (2003). An 
arrangement for the developmental processes of 
harvesting heat from open fire to electricity is 
shown below. 
 
Figure 1. Operational arrangement of heat-to-electrify charger device.  
This one works with the principle of 
thermoelectricity which appeals to African 
communities with special reference to off-grid 
dwellers. The major different is on how heat is 
harvested: the first one goes directly into the fire 
while the other is positioned in proximity with fire 
so as to harvest heat from the fire.  In this work, 
our production was based on the technology that 
harvests heat by placing it in close proximity with 
the heat source.  
The heat collector here is an arrangement 
designed to collect and transfer heat from the heat 
International Journal of Advanced Network, Monitoring and Controls      Volume 06, No.01, 2021 
26 
source into the system. In order to optimize this 
heat collection and transfer process, aluminum 
sheet is used to fabricate the concave heat transfer 
base.  This plate collects as much heat as possible 
from the cooking stove, wood or gas while the 
blade can be pushed into the fire flames for better 
heat collection and transfer.  
This physical phenomenon where materials 
develop an electric potential due to temperature 
difference is known as thermoelectric effect. Here, 
the thermoelectric modules are positioned in-
between the heat harvester. The temperature 
differences the hot and the cold sides of the heat 
harvester produce some quantity of electricity. 
Thermoelectric modules simply convert a 
temperature differential across the device, and 
resulting heat flow through it, into a voltage via 
the Seebeck effect. The polarity of the output 
voltage is dependent on the polarity of the 
temperature differential across the thermoelectric 
modules. Reverse the hot and cold sides of the 
thermoelectric modules and the output voltage 
changes polarity. Thermoelectric modules are 
made up of pairs or couples of N-doped and P-
doped semiconductor pellets connected 
electrically in series and sandwiched between two 
thermally conductive ceramic plates.  
IV. ANALYSIS AND PRESENTATION OF RESULTS 
 
 
X-axis Temp  
degrees C 
Y-axis 
Voltage 
25 0.20 
30 2.90 
35 5.20 
40 5.89 
45 6.07 
50 7.10 
55 8.20 
60 8.46 
65 8.46 
70 8.46 
75 8.46 
Figure 2. Relationship between source temperature and voltage. 
 
X-axis Temp in 
degrees C 
Y-axis 
Current in mA 
25 1.20 
30 4.37 
35 4.40 
40 4.54 
45 5.06 
50 5.70 
55 5.93 
60 6.50 
65 6.80 
70 7.00 
75 7.20 
 
Figure 3. Relationship between temperature and current output 
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Y-Values
0
1
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8
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International Journal of Advanced Network, Monitoring and Controls      Volume 06, No.01, 2021 
27 
 
X-axis  Temp  
degrees C 
Y-axis Power in 
mW 
25 0.24 
30 12.67 
35 24.01 
40 26.74 
45 30.721 
50 40.47 
55 49.60 
60 55.00 
65 57.52 
70 59.22 
75 60.90 
 
Figure 4. Relationship between source temperature and power output 
V. CONCLUSIONS. 
The results of the tests and experiments prove 
that this heat-to-electricity conversion device 
authentic. Moreover it is observed that best results 
come when the intensity of the heat absorptions 
and disseminations on the thermoelectric device 
are maximized. It is therefore recommended the 
elements like heat blowers and sinks be 
incorporated in the design and construction. The 
increasing concern of environmental issues of 
emissions, in particular global warming and the 
constraints on energy sources has resulted in 
extensive research into innovative technologies of 
generating electrical power and thermoelectric 
power generation have emerged as a promising 
alternative green technology. There are vast 
quantities of heat waste discharges into the earth’s 
environment much of it at temperatures that are 
too low to recover using conventional electrical 
power generators, Min G, (2004). However, 
thermoelectric power generation comes with a 
technology of direct conversion of waste-heat 
energy, into electrical energy and hence power. 
This technology is being utilized in a number of 
useful applications due to their distinct advantages. 
There are micro- and macro-scale applications 
depending on the potential amount of heat waste 
energy available for direct conversion.  Micro-
scale applications included those involved in 
powering electronic devices, such as microchips. 
Since the scale at which these devices can be 
fabricated from thermoelectric materials and 
applied depends on the scale of the miniature 
technology available. Therefore, it is expected that 
future developments of these applications tend to 
move towards nano-technology. 
 
REFERENCIES 
[1] Rowe DM. Thermoelectric waste heat recovery as a 
renewable energy source. Int J Innov Energy Syst 
Power 2006; 1: 13-23. 
[2] Rowe DM. Thermoelectrics, an environmentally-
friendly source of electrical power. Renewable Energy 
1999; 16: 1251-1265. 
[3] Riffat SB, Ma X.  Thermoelectrics: A review of present 
and potential applications. Appl Therm Eng 2003; 23: 
913-935. 
[4] Nuwayhid RY., Rowe DM. Min G. Low cost stove-top 
thermoelectric generator for regions with unreliable 
electricity supply. Renewable Energy 2003; 28: 205-
222. 
[5] Weiling L, Shantung TU. Recent developments of 
thermoelectric power generation. Chin Sci Bull 2004; 
49(12): 1212-1219. 
[6] Min G, Rowe DM, Kontostavlakis K. Thermoelectric 
figure-of-merit under large temperature differences. J 
Phys D: Appl Phys 2004; 37: 1301-1304. 
[7] http://www.customthermoelectric.com. 
[8] http://www.ferrotec.com. 
 
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Performance Analysis of Heat-Based Smart Phone Charger

Jian, Wang

Yubian, Wang

International Journal of Advanced Network, Monitoring and Controls      Volume 06, No.01, 2021 
DOI: 10.21307/ijanmc-2021-005                            28 
Research on User Dynamic Selection Network Technology 
 
Wang Jian 
School of Computer Science and Engineering 
Xi'an Technological University 
Xi'an, 710021, China  
E-mail: 470081729@qq.com 
 
Wang Yubian 
Department of Railway Transportation Control 
Belarusian State University of Transport 
34, Kirova street, Gomel, 246653 
Republic of Belarus 
E-mail: alika_wang@mail.ru 
 
 
 
Abstract—As the world has entered the Internet era, 
more and more network operators have also developed 
one after another, which has been widely used in 
communities, schools, banks and other regions. Due to 
the uneven distribution of network providers in different 
regions, a certain network line is not running smoothly. 
In order to solve this problem, this paper puts forward a 
method that users can dynamically choose networks 
according to their preferences, and the problem can be 
solved by static routing and network address 
translation. At first, set the internal IP addresses of 
different users and the external IP addresses provided 
by internet providers on the ports on both sides of the 
user LAN router. During network address translation, a 
fixed one-to-one relationship established by the internal 
IP and the external IP is loaded into the routing table of 
the user LAN as a static route. Finally, users can actively 
and dynamically set the internal IP of the user LAN 
router in the router list in the user computer and realize 
the method that the user dynamically selects different 
interconnection networks. 
Keywords-Dynamically Choose Networks; Network 
Address Translation; Internal IP 
I. USER DYNAMIC SELECTION NETWORK 
Regional Internet Service Provider (ISP) 
provides services for community ISP who is 
similar to a unified relay station provides directly 
network support for users. In this way, the packet 
cannot be transmitted directly, but are transmitted 
after some preprocessing in the middle [1].  
There are three methods for users to choose the 
Internet.  
One is that the network ports provided by the 
community ISP and a regional ISP only is 
connected, as shown in Figure 1(a). The main 
drawback of this method is that once the network 
fails, the user LAN will be completely paralyzed. 
And the speed of accessing the network will 
become very slow when the user visits reach the 
peak [2]. 
The other is that the community ISP provides a 
main line and a standby line port, which are 
connected with the network port provided by the 
region as shown in Figure 1(b). The advantage of 
this method is that when the main line fails, the 
standby line still keeps running. But that line is 
extremely low and cannot run smoothly. 
Obviously, this situation cannot provide users with 
dynamic choice of internet. 
The third is that the network ports provided by 
community providers are connected with the 
network ports provided by different regions, as 
International Journal of Advanced Network, Monitoring and Controls      Volume 06, No.01, 2021 
29 
shown in Figure 1(c). The advantage of this 
method is that when a line goes wrong, it can be 
switched to other lines at any time, ensuring the 
reliability of data transmission [3]. At the same 
time, it also provides an optimal method for users 
to dynamically select networks. 
 
Figure 1. Connection methods of three modes of computer LAN 
accessing internet 
By comparison, the third route selection 
method is adopted. Because users can dynamically 
select the network provided by different ISP. 
When a line fails or is not smooth, users can also 
choose a better route according to their personal 
preferences. 
II. PRINCIPLE OF METHOD 
IP addresses provided by different region ISP 
are different when the region provides services for 
a community. If the community switches different 
network ports, it must return the network ports 
provided by this region ISP, and then allocate IP 
addresses provided by another region provider for 
each computer in the community.  
Obviously, this method is inconvenient and 
greatly affects the timeliness of dynamic network 
allocation. But Network Address Translation 
(NAT) function can be introduced into the 
community router to solve this problem [4]. NAT 
allows the whole group to share a public IP 
address in the Internet. In fact, it is an Internet 
technology that can convert the private address of 
the internal network into a public address [5]. It 
can not only share a public address, but also use 
the bandwidth provided by the local network 
service provider to access the Internet safely at 
high speed [6], hiding and protecting the 
computers inside the network. 
As shown in Fig. 2, IP addresses assigned by 
ISP1 and ISP2 to router ports of user LAN in 
community are 200.10.45.253 and 200.33.67.253 
respectively, and IP address pools assigned to user 
local area network in community are 
200.10.46.0/24 and 200.33.68.0/24 respectively. 
All of which are true IP addresses on the internet.  
For example, if the user wants to change the 
ISP1 to the ISP2, the address pool allocated by 
ISP1 for the community LAN must be returned to 
it, and then each computer in the community is 
allocated the IP address 200.33.68.0/24 provided 
by ISP2. Obviously, this method is inconvenient 
and also leads to the waste of IP addresses.  
If the NAT is introduced into the router in the 
community, and a LAN is set up in the community 
to use the internal IP address. Finally, the problem 
will be solved. For example, the internal IP is 
192.168.0.0/8. When the user 192.168.0.5 sends 
data packets to the 203.120.10.30 on the Internet. 
The community Router first finds the next hop 
200.10.45.253 of the best route in its routing table, 
so NAT converts 192.168.0.5 into an external 
address, that is, a true IP address assigned by ISP1.  
International Journal of Advanced Network, Monitoring and Controls      Volume 06, No.01, 2021 
30 
 
Figure 2. Connection block diagram for users to dynamically select different regional ISP  
In this way, for 203.120.10.30, the data packet 
is sent from 200.10.46.8. When the packet is 
returned, it is returned to 200.10.46.8, and then 
NAT converts the address into 192.168.0.5. In this 
process, few public IP is reused for private 
network, which greatly reduces the address usage 
[7]. The community LAN router can automatically 
select the best route, but the user can't control this 
route. 
III. DYNAMICALLY SELECTS NETWORKS 
PROCESS 
The purpose of this paper is to provide a 
method for users to dynamically select region ISPs 
that users can choose different ISPs to access the 
Internet at any time according to their preferences 
through community LAN. And pay fees for such 
access services according to the prior agreement. 
The method for users to dynamically select the 
internet mainly comprises the following steps: 
Step1: Connect the routers of the user LAN 
with the routers of several regional network 
providers. 
Step2: Set different internal IP addresses at the 
port of the user LAN router, and set various 
external IP addresses at the other port of the user 
LAN router. 
Step3: When the network address is translated, 
a fixed one-to-one relationship established by the 
internal IP and the external IP of the ports on both 
sides is loaded into the routing table of the user 
LAN as a static route. 
Step4: The user actively and dynamically sets 
the internal IP address of the user LAN router in 
the router list in the user computer according to his 
preference. 
The flow chart of user's dynamic selection of 
network is shown in Figure 3. 
International Journal of Advanced Network, Monitoring and Controls      Volume 06, No.01, 2021 
31 
 
Figure 3. Flow chart of user 's dynamic selection of network 
IV. LOADING THE ROUTER LIST 
There are three ways to set the internal IP 
address of the user LAN router in the router list in 
the computer: first, only one internal IP address of 
the router is reserved; Second, keeping all the 
internal IP addresses of the router, but with 
different priorities and filtering conditions; Third, 
keeping all the internal IP of the router, but with 
the same priority and filtering conditions; 
Filtering conditions refer to the stability, price 
and bandwidth of region ISP. 
According to these three router list 
configurations, routers in community LAN also 
have three strategies: 
First, the user's data packets are sent and 
received according to the internal IP address and 
external IP address recorded in the routing table. 
The second is to select the internal IP address 
with higher priority from the list of routers in the 
user's computer. If the corresponding external IP 
address reaches the screening index, the user's 
packet will be forwarded along this route. On the 
contrary, if it fails to reach the index, the internal 
IP address with a lower priority is selected to 
judge whether it reaches the index. Repeat this 
step until you find a route that meets the filter 
criteria; If there is no route that meets the filtering 
criteria, the user's packet is not sent.  
Thirdly, an internal IP address is randomly 
selected from the routing list in the user's 
computer. If the corresponding external IP address 
reaches the screening index, the data packet will 
be sent and received according to this route; On 
the contrary, if the index is not reached, another 
internal IP address is taken to judge whether it 
meets the index; Repeat this step until you find out 
the route that reaches the screening index; If there 
is no route reaching the screening index, the 
packet will not be sent. 
The first way to configure the router list is to 
manually select the network according to the 
International Journal of Advanced Network, Monitoring and Controls      Volume 06, No.01, 2021 
32 
preference. However, the latter two are that the 
community LAN automatically selects the internet 
provided by the regional providers who can meet 
the screening criteria. 
V. DETAILED DESCRIPTION OF THE METHOD 
In the technology of user dynamic selection of 
network, network address translation can be 
realized by router with NAT function [8] or by a 
separate device with conversion function. Two 
routers (RNAT1 and RNAT2) with translation 
function are connected to the Ethernet switch of 
the user LAN, and a fixed one-to-one relationship 
established by the internal IP and the external IP 
of the ports on both sides through the network 
address translation device is loaded into the 
routing table of the user LAN as a static route. In 
this way, the internet provided by regional 
providers can be dynamically switched by users. 
As shown in Fig. 4. The internal IP addresses 
set up at the ports connecting RNAT1 and RANT2 
to LAN are 192.168.0.1 and 192.168.0.2 
respectively, and the external IP addresses 
200.10.45.254 and 200.33.67.254 provided by the 
ISP1 and ISP2 are located on the port where 
RNAT1 connects to ISP1 and the port RNAT2 
connects to ISP2 respectively.  
A fixed one-to-one relationship recorded in the 
routing table of the user LAN as a static route 
between two routes is established through network 
address translation. And RNAT1 and RNAT2 
ports connected to regional ISP correspond to true 
IP addresses 200.10.45.254 and 200.33.67.254, 
respectively. When the user is willing to use ISP1, 
192.168.0.1 is uniquely set in the router list on his 
computer; And vice versa. 
At the same time, the user can also record the 
two internal IP addresses 192.168.0.1 and 
192.168.0.2 in the computer, and set different 
priorities for them with filtering conditions; Or the 
priority is the same with filter conditions. 
 
Figure 4. Application Example of User Dynamic Selection Network 
Method 
VI. METHOD IMPROVEMENT 
A.  For technical improvements 
Figure 5 is an application diagram for further 
improvement of technology, which is equivalent to 
merging two routers with NAT function. Router 
NAT assigns different internal IP addresses to 
Ethernet interfaces.  
For example, the external IP addresses 
200.10.45.254 and 200.33.67.254 provided by 
region ISP1 and ISP2 are respectively located at 
the port where Router NAT is connected to ISP1 
and where Router NAT is connected to ISP2; 
Then a fixed one-to-one correspondence recorded 
in the routing table of the user LAN as a static 
route between the two routes is established 
through NAT translation. And the next hops of 
200.10.45.254 and 200.33.67.254 are fixed to 
router port 200.10.45.253 of SP1 and router port 
200.33.67.253 of ISP2 respectively. 
International Journal of Advanced Network, Monitoring and Controls      Volume 06, No.01, 2021 
33 
 
Figure 5. Application Example of Method Improvement Scheme 
Assume the user 192.168.0.5 sends a packet to 
203.120.10.30. Because there is no this address in 
the community LAN, the packet flows to 
191.68.0.1, passes through 200.10.45.254 to the 
port address 200.10.45.253 of ISP1. And Router 
NAT converts 192.168.0.5 to 200.10.46.8. 
Therefore, it seems to ISP1 that the data packet is 
sent from 200.10.46.8. When 203.120.10.30 
returns data, the steps are the same as above. 
If 192.168.0.5 wants the service of ISP2, it 
directly changes the unique address in the router 
list on its computer to 192.168.0.2, and the process 
is similar to the above. 
At the same time, the user can keep two 
internal IP addresses of the router, and set 
different priorities for them with filtering 
conditions or set same priorities with filter 
conditions. 
B.  Improvement scheme for a large number of 
users 
When there are a large number of users using 
the network in the community, the community 
LAN is divided into several subnets, such as 
LAN1, LAN2 and LAN3 in Figure 6. Each subnet 
connected with two NAT devices through 
different Ethernet switches is connected to the 
Internet through R1 or R2, and then a one-to-one 
correspondence between the internal IP and the 
external IP of the ports on both sides of the router 
is established. 
When 192.168.2.6 in LAN2 wants to access 
ISP2, 192.168.2.2 is uniquely set in the router list 
of its computer. When users want to access ISP1, 
the steps are the same as above. 
 
Figure 6. An application example in complex community 
International Journal of Advanced Network, Monitoring and Controls      Volume 06, No.01, 2021 
34 
The method can also provide users with a 
technical scheme of entrusting routers to select on 
their behalf, that is, allowing users to propose a set 
of conditions for determining routes, which are 
called screening conditions. Such as routing 
stability, price, bandwidth, etc. Routers regularly 
carry out statistical analysis on routes to providers 
in various regions, and calculate screening 
indicators for each route. When the route used by 
the user changes, the router compares the filtering 
indexes of each route with the conditions proposed 
by the user, and then selects a satisfactory route 
for the user to use. 
VII. CONCLUSION 
The main purpose of this paper is to improve 
the user's experience in using the network, and to 
enable users to dynamically choose the network 
methods provided by different operators in the 
user LAN. Because the frequency distribution of 
users using the network at different times is 
uneven. Through connecting the routers of the 
user LAN with the routers provided by the 
operators, and then the internal IP address of the 
user LAN is converted into the external IP address 
provided by the operators through the network 
address conversion technology. So that users can 
dynamically select the networks, and the smooth 
operation of the network can be realized during the 
peak period of the network. Compared with the 
traditional network, this method greatly improves 
the fluency of users in the process of using the 
network. And this method has been put into use in 
YiZhuang, and won the first place in the 
construction project of "YiZhuang 12 square 
kilometers triple play demonstration zone". 
ACKNOWLEDGEMENT  
The main content of this paper comes from 
patents of Yu Kun, Patent name: A method for a 
user to select an Internet provider dynamically, the 
patent number: ZL 200310101888.X, His address 
is Room 171, Building 4, Zone 1, Zhongcanyuan, 
No. 58 Anli Road, Chaoyang District, Beijing, 
100012.  
 
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