2023-01-16: As of December 25, 2022, the production and operation of Yunnan Yongchang Lead-Zinc-Manganese Smelter ended perfectly. The output of Zinc-Manganese and Sulfuric Acid reached 101.07 and 123.21 of the annual target respectively. Zinc grade 0 increased by 32.28 year-on-year. First, Party building leads