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China National Standards Drafted
YST was invited as the main drafter of several China National Standards:



"Lead-free solders" GB/T 20422-2006


"Test method for solders" GB/T 28770-2012


"Test method of the strength for brazed and soldered joint" GB/T 11363-2008


"Test method of wettability for brazing filter metals" GB/T 11364-2008


"Soft soldering flux - classification and requirements" GB/T 15829-2008



"No-clean flux used for crystalline silicon photovoltaic(PV) modules"SJ/T 11549-2015