Nantong Liyang Chemical Co., Ltd., established in October 2007, is a wholly-owned subsidiary of Nantong acetic acid Chemical Co., Ltd. (hereinafter referred to as "acetate", stock code: 603698). It is located in Yangkou Chemical Industrial Park, Rudong County, Jiangsu Province, with a registered capital of 80 million yuan. Taking pyridine derivatives as the main line of R & D, production and operation, the company continues to expand pyridine series products to serve the fields of new medicine, pesticide intermediates and new chemical materials. The main products are acetonitrile, cyanopyridine, ammonium sulfate, pyrazolone, etc. many products are "high-tech products of Jiangsu Province" and "national key new products". Relying on the parent company vinegar Chemical Co., Ltd., the core technology has strong technological innovation and industrialization ability, strong advantages in R & D and market, has a number of patents, and has established in-depth cooperative relations with colleges and universities and scientific research institutes such as Nanjing University and Hunan Institute of chemical industry through the mode of "integration of industry, University and research". The company always adheres to the business purpose of "quality first, customer first, continuous improvement and continuous improvement", constantly improves the internal management of the enterprise, improves the competitiveness, and takes the road of sustainable development under the guidance of scientific development. It has successively passed the certification of GB / t19001-2016 / iso9001:2015 quality management system, GB / t24001-2016 / iso14001:2015 environmental management system and GB / t45001-2020 / iso45001:2018 occupational health and safety management system, and passed the secondary safety production standardization in 2016.