STU (Standard Technology Union(GuangZhou China)) which is one of CBTL (CB Testing Laboratorie) in IECEE (IEC System for Conformity testing and Certification of Electrotechnical Equipment and Components).  Nemko is our NCB(National Certification Body), that's mean Nemko is willing to issue the certification based on STU test report directly. We can give CB/CE/GS/SAA certification service for your purchased electrical products in China since we are Nemko CBTL and IECEE member as well as have rich experience in testing Household appliance ,electrical/electronic ,lightings etc.