Founded in 1989, Rosi Chemical Co., Ltd. is led by experts of the National Thousand Talents Program. Its subsidiaries include: Shanghai LeSi Biological Technology Co., Ltd. (pesticide pharmaceutical research and development base), Jiangsu LeSi Chemical Co., Ltd., Jilin Lesi Pharmaceutical Co., Ltd., Qinghai LeSi Pharmaceutical Co., Ltd. The company is the standing director unit of China pesticide industry association and the drafting unit of national pesticide standard.