Tianjin Zhongren Pharmaceutical Industry Limited Company is a pharmaceutical manufacturer based in Tianjin, China. It specializes in producing active pharmaceutical ingredients (APIs) and other medicinal products. The company has been involved in international business, supplying APIs to global markets. However, it faced scrutiny from regulatory agencies like the FDA in the past. For example, during a 2013 inspection, the FDA identified issues related to equipment cleanliness and process documentation at its plant, leading to a warning letter. The FDA found problems with contamination and improper cleaning practices, as well as discrepancies in manufacturing processes.