DST is a professional testing and certification authority of sanitary ware, plumbing equipment, electrical and electronic industry, with qualified third-party testing and certification agencies, laboratories, quality certification in strict accordance with ISO/IEC17025 standard system run by China National Accreditation Board for Conformity Assessment (CNAS) of audit . Multi-national standards, according to taps, showers, hoses, valves and other products for testing, test data scientifically accurate, fair and impartial report of international credibility, access to 58 countries and regions worldwide recognition.