Zhejiang Dayang Biotech Group Co., Ltd. (003017.SZ) manufactures and sells chemical raw materials, focusing on inorganic salts, veterinary drug active pharmaceutical ingredients and fluorine-containing fine chemicals; its core products include food additive, industrial, agricultural and feed grade potassium carbonate and potassium bicarbonate, ammonium chloride, amprolium hydrochloride (with US FDA and veterinary GMP certification), ceftiofur sodium and hydrochloride, cefquinome sulfate, decoquinate, colistin sulphate B, 2-chloro-6-fluorobenzaldehyde, 2-chloro-6-fluorobenzyl chloride and other fluorine series; the company operates from its headquarters in Jiande City, Zhejiang Province, China, exporting to dozens of countries across the Americas, Africa, Europe and Southeast Asia. Founded in 1976 and listed on the Shenzhen Stock Exchange main board in 2020, the company maintains a "one body two wings" structure centered on potash products with veterinary drugs and fine chemicals; it holds certifications including ISO9001, ISO14001, ISO22000 and ISO45001, and operates provincial research centers, postdoctoral workstation and potassium salt institute as a national high-tech enterprise and drafter of Chinese potassium carbonate standards. Recent developments feature expansion of amprolium hydrochloride capacity to 800 tons annually by mid-2026 alongside full utilization of existing 600 tons, pilot production of PEEK intermediates like difluorobenzophenone leveraging fluorobenzene facilities, a 2025 equity incentive plan granting up to 0.994 million restricted shares, projected first-half 2025 net profit growth of 43-75% year-over-year and new materials focus on lightweight potassium carbonate and fluorine chemicals amid rising hydrochloride aminopropyl demand.