Lanki Sanyi Chemical Co., Ltd. was established on March 14, 2003, located in Zone B3 of Nübu Industrial Park, Lanki City, Zhejiang Province. The company has always been committed to improving its modern management level and market development capabilities, with production technology leading domestically and product quality ranking among the top. The company is a chemical enterprise with advanced domestic production equipment, strict production process management, and product quality control technology.

The company's main products include p-toluenesulfonyl chloride, p-toluenesulfonamide, o-toluenesulfonamide, p-tolyl methyl sulfone, and other series of products. In 2018 and 2019, it was honored as one of the "Top 20 Enterprises in Tax Revenue per Mu in Lanki City."