Guangzhou Hengchuang Testing Technology Service Co., Ltd. (STU) is an independent third-party testing, certification, and calibration laboratory. It is a national level "high-tech enterprise" and a "specialized, refined, and innovative" enterprise. It is also a "public platform for mechanical and electrical product testing and food safety" of the Ministry of Science and Technology of China.

The company was established in 2005 and is affiliated with Guangzhou Microbiology Research Institute Group Co., Ltd., a subsidiary of Guangzhou High tech Zone Group. We specialize in conducting certification testing for mechanical and electrical safety, optoelectronic science, materials, physical and mechanical properties, environmental reliability, chemical environmental protection, bacteria and microorganisms, as well as measuring and calibrating instruments and equipment such as length, mechanics, thermodynamics, electricity, physics and chemistry, and specialized tools. It is committed to protecting the transformation and upgrading of Chinese manufacturing and moving towards the the Belt and Road. The company has successively obtained 28 international and domestic qualifications such as the United Nations International Electrotechnical Commission IECEE CBTL and the China National Laboratory Accreditation Service CNAS, obtained more than 40 patents, drafted a series of national standards, local standards, and industry standards, and led 8 scientific research projects of the Provincial Department of Science and Technology and the Municipal Science and Technology Innovation Commission.