In 2021, it was renamed Hunan Yinqiao food additives Co., Ltd. At this stage, the annual production value of sodium pyrosulfite is 100000 tons, the annual production capacity of sodium bisulfite is 25000 tons, the annual production capacity of sodium sulfite is 40000 tons, the annual production capacity of sodium bicarbonate is 36000 tons, and the annual production capacity of magnesium sulfate heptahydrate is 15000 tons.