Links

Beijing Public Security Bureau (北京市出入境管理局)
the authority that extends visa and will define policies to ensure public security.

http://www.bjld.gov.cn/ (北京劳动保障网)
beijing labor bureau .

http://beijing.caiep.org/(北京市外国专家局)
Beijng Administration of Foreign Experts Affairs.

http://www.safea.gov.cn/（国家外专局）
State Administration of Foreign Experts Affairs .

http://www.beijing.gov.cn/ (首都之窗)
this website is a very useful website, almost every information about beijing.