2nd, Floor, Building A, No. 33, HuilongseScience Park, Daxing, 100176 Beijing China Telephone +86 10 56532818 首页

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2nd Floor, No. 2 Bldg. JingBao Bldg., No. 9 Shuangyuan Road, Shijingshan Dist., 100041 Beijing China Telephone +86 10 88204630 Fax +86 10 88204632 market@choicemmed.com http://www.choicemmed.com

7, Fengxian M. Rd., Haidian District, 100094 Beijing China Telephone +86 10 58717511 Fax +86 10 58717500 BD@chemclin.com http://www.chemclin.com

Room 501, Building 22, Mapo Science Park Liando u Valley, No.12, Juyuan Middle rd, 101399 Beijing China Telephone +86 10-82890879 Fax +86 10-82890879 contact@bws-tech.com http://www.bws-tech.com/

Miyun Economic Development Zone, 101500 Beijing China Telephone +86 10 69061748 Fax +86 10 69061747 shangjianli@bjbest.com.cn http://www.bjbest.com.cn