Shenzhen Baoan District Xixiang Yisi hair Technology Co. Ltd., is the development of memory test software, test solution of memory particles, memory tester, SD/DDR/DDR2/DDR3/DDR4 memory test system, twenty focus memory test software, in addition the company has also developed some machines, DHJ spot welter YSF-01Spot welder. Ysf-03 spot welder