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Tel: 021-37656257

(northern region) manager   Lin 13564769697 (the same as wechat) QQ: 2830699005

(Central China) manager      Xu 18116337084 (same as wechat) QQ: 2459635547

(southern region) manager Chen 18117403825 (the same as wechat) QQ: 3011823639

Email: tsimaths@163.com

Address: Haier Zhigu, Guangfulin East Road, Songjiang District, Shanghai

Fax: 021-61769285

Q Q:3152715460