Nanjing Chengyi Chemical Co., Ltd. was established in 2008, formerly known as Shanghai Pudong Xuguang Chemical Co., Ltd., founded in 1993. It is one of the earliest specialized enterprises in China engaged in the production of oxalate series products. After over 30 years of development and construction, it has evolved from a single-product production facility into a group company with two production bases, specializing in the research, development, production, and trade of pharmaceutical and pesticide intermediates, as well as fine chemicals.

   Xiantao Weixun Chemical Co., Ltd. was established in 2011, located in Hebei Industrial Park, National High-Tech Zone, Xiantao City, Hubei Province. With a registered capital of 8 million yuan, it covers an area of 22,000 m2 and boasts advanced production processes and equipment, along with a comprehensive quality management and testing system. Its production lines include an annual output of 8,000 tons of diethyl oxalate, 4,000 tons of dimethyl oxalate, and 2,000 tons of dibutyl oxalate. The product quality ranks among the top in China, and the products are exported year-round to countries such as the United States, Germany, Italy, and Japan, maintaining long-term cooperation with internationally renowned chemical enterprises.
   Jingzhou Chengyi Chemical Technology Co., Ltd. was established in 2021, located in Lingang Industrial Park, Songzi City, Jingzhou City, Hubei Province. With a registered capital of 30 million yuan, it occupies over 100 acres of land and features newly constructed facilities including 20,000 m2 of workshops, 2,000 m2 of office buildings, 8,000 m2 of warehouses, and a 12,000 m2 wastewater treatment workshop. Equipped with more than 300 sets of reaction kettles, distillation towers, and other equipment, its annual production capacity includes 5,000 tons of diethyl oxalate, 7,000 tons of dimethyl oxalate, 1,000 tons of dibutyl oxalate, and 20 tons of photosensitive material intermediates.