STU is a Standard Technology Union Co., Ltd. 's English acronym, STU is the world's third-party testing and certification industry pioneer and the leader. STU for global manufacturers provide one-stop services, from research and development, testing, certification to the whole process of inspection for manufacturers to provide professional technical services, is fully committed to optimizing customer product quality, to avoid export risks, reduce costs and enhance business international competitiveness.

STU accredited by China National Accreditation Service for Conformity Assessment (CNAS) &China Metrology Accreditation (CMA); Meanwhile accredited by Worldwide System for Conformity Testing and Certification of Electrotechnical Equipment and Components (IECEE). CBTL issued certificate, is CBTL Lab. As one of the the CBTLs of IECEE-CB Scheme, STU has got close project co-operation with many famous certification body in worldwide. Due to STU has recognized by many certification bodies in worldwide so the applicants can other country's certificate (more than 50 countries) base on STU test report.

STU focus on electronic and electrical consumption product, mechanical safety, chemical testing, gas product, toy, Textiles (clothing, footwear), automobile part testing, Civil Aircraft Landing Gear, accessory and engine borescope testing, the NDT testing for boilers and pressure vessels safety, construction steel parts, medical devices, packing, shipment, environment, reliability, food analysis/microbiology, solar product, building material and bathroom material, fitness equipment in different industries. We also offer China Compulsory Certification (CCC), international exchange certificates, Pre-shipment Inspection (PSI), training and quality management systems services