Suzhou Porcelain Insulator Works Co., Ltd. (hereinafter called SPIW), founded in 1936, is one of the earliest professional manufacturers of porcelain insulators in China. It was listed in the National SME Share Transfer System in Dec. 16th, 2015 (stock name: Suzhou Electrical Porcelain; stock code: 834410). For a long time, SPIW has positively been developing and manufacturing various types of porcelain insulators…