A subsidiary of China Northern Rare Earths (Group),Tianjiao Seimi Polishing Powder Co.,Ltd.,started construction of its renovation and expansion project of 9,000 tons of rare earth polishing powder on June 6.After the completion of the project,Tianjiao Seimi will realize a production capacity of 9,000 tons of high-end polishing powder,which will be used for 5G cloud storage,photomask and ultra-high precision optical devices,etc.The project will be completely intelligent and digital and will realize comprehensive recovery and utilization of fluorine,water,and waste heat.The plant will be a low-carbon green factory with optimized comprehensive energy consumption.