In January 2017, HUAXIN added 1,150 square meters of 500kV inorganic bonded porcelain sleeve production plant construction, and separated the grinding process of this type of porcelain sleeve from the bonding kiln installation process on site. At the end of February 2017, a new 4 special lathes for interface grinding divide the interface grinding process of ceramic parts into rough grinding and fine grinding processes according to the equipment layout. Such interface grinding process adjustment can improve the interface grinding accuracy, which is the first application in the same industry in China.