Tianjin Zhong'an Pharmaceutical Co., Ltd. is a Chinese pharmaceutical company established on February 1, 2002. It is located in the Xiqing District of Tianjin, covering an area of approximately 82,000 square meters. The company specializes in the manufacturing of chemical raw materials and has a wide range of products, including active pharmaceutical ingredients (APIs) like caffeine, theophylline, aminophylline, and metronidazole