1, Beijing: Est-Ouest Testing & Technical Services (Beijing) Co.
2, Shanghai: Est-Ouest Testing and Technical Services (Shanghai) Co.
3. Guangzhou: Est-Ouest Testing & Technical Services (Guangzhou) Co.
4, Shenzhen: Est-Ouest Testing & Technical Services (Shenzhen) Co.
5, Chengdu: Est-Ouest Testing & Technical Services (Chengdu) Co.
6, Wuhan: Est-Ouest Testing & Technical Services (Wuhan) Co.
7. Qingdao: Est-Ouest Testing & Technical Services (Qingdao) Co.
8. Hangzhou: Est-Ouest Testing & Technology Service (Hangzhou) Co.