Stefan Bücke
General Manager
+86-10-65900067-216 
0505P, 5F, Tower 1, DRC Liangmaqiao Diplomatic Office Building, No. 19 Dongfangdonglu, Chaoyang Dist., Beijing
LIU Yang
Northern Regional Manager
+86-18710043356
DRC Liangmaqiao Diplomatic Office Building, Tower 1, Unit 0505P, No.19 Dongfang donglu, Chaoyang District, Beijing