Beijing Headquarter：Rm-1901 Jianan Building A No.2 Youanmen AV. Beijing 100054, China
Tel：+86-10-63511718,83517835, 83519610
Fax：+86-10-63511510
For service issues： service@wtc.net.cn
For sales issues： sales@wtc.net.cn

Shanghai Office：Rm. 310 , CIMIC Tower No. 1090 Century AV. Pudong, Shanghai 200120, China
Tel：+86-21-58353176, 5835317
Fax：+86-21-58353175

US Office：3631 Peachtree Industrial Blvd. Suite 107 Duluth, GA 30096，USA
Tel：+1-404-966-2082
Fax：+1-208-439-5650