Tel: 010-53672994 Fax: 010-59070635 E-mail: bjsihekeji@163.com Address: No.1901,Building B,wangtong Center,Chaoyang District,Beijing.
Beijing Sihe science and technology limited companyAddress: No.1901,Building B,wangtong Center,Chaoyang District,Beijing.Zip code: 100020E-mail: bing_cb@163.comTel:010-53672994Fax: 010-59070635