Tianmen Chengxin Chemical Co., Ltd. is a high-tech enterprise specializing in the production of oleic acid, stearic acid and other series products using oil scraps as raw materials. "Innovative Pilot Enterprise" and was awarded the "Top 20 Tianmen Industrial Enterprises" by the Tianmen Municipal Committee of the Communist Party of China and the Tianmen Municipal People's Government.

Founded in March 2004, the company is located in Health Village, Yuekou Town, Tianmen City, Hubei Province, covering an area of 40 acres. In December 2019, it became a subsidiary of Zanyu Technology Holdings. The company has oleic acid distillation process and freezing process production lines, with an annual processing capacity of 40,000 tons of oil waste. The main products are oleic acid, stearic acid, vegetable asphalt, etc., which are mainly sold to Hubei, Guangdong, Fujian, Jiangxi, Anhui, Sichuan, Henan and so on.