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east 116.41
west 116.41
south  39.87
north  39.87
Service information
contacts:
Quan Weijun
phone:
010-58991325
mailbox:
quanquan78430@163.com
Contact information
contributors:
Quan Weijun , Wang Zhenfa
author:
Quan Weijun , Min Yu Fang
manager:
Quan Weijun