... and subsidiaries in many cities in China such as Guangzhou, Shenzhen, Shanghai, Beijing, Tientsin, Nanking, Hangzhou, Wuxi, Xiamen, Quanzhou, ... the VI cooperator of many well-known companies, such as SINO-CHEM, PetroChina, China Mobile, China Telecom, Wal-Mart, ... and rated at "AA Credit Rating Enterprise" by China Foreign Trade Enterprise Credit System Expert Evaluation Committee. Our business extent ...