... cooperative manufacturers. Chungkong was the first chain enterprise established under the official approval of government in ... Guangzhou, Shenzhen, Shanghai, Beijing, Tientsin, Nanking, Hangzhou, Wuxi, Xiamen, Quanzhou, Changsha, Wuhan, Zhengzhou, Taiyuan, Chengdu, Kunming, Chongqing ... rated at "AA Credit Rating Enterprise" by China Foreign Trade Enterprise Credit System Expert Evaluation Committee. ...