Zhoushan Hisun Electronic Co., Ltd. is a company of Zhejiang Hisun Gro-oup,which specializes to produce, manage and develop Quartz Crystal, and also of the China Piezocrystal IndustryAssociations. Now, the company is one of the biggest production basis in China to produce crystals, the production could reaches seventy - five million per year. The company carries IEC Stand- ard and passes ISO9002 in december 1998.