Shenzhen Yitong Testing Technology Co., Ltd. (TTS), it is a third party of professional testing agency, itâ??s focus on test, inspection and validate of industry and consumer goods. Our Laboratory have successfully certificated by CNAS (China National Accreditation Service for Conformity Assessment) and CMA (China Metrology Accreditation). Our management and operation is completely according to ISO/IEC17025:2005â??Requirement for Testing and Calibration Laboratoryâ??, we can provide the authoritative test report to society. TTS has a perfect reliability test laboratory for electrons and electrician, and establish the unique professional laboratory for paper product, packaging material and transport package in South China.