ESTS (Extensive Standard Technical Services Co., Ltd.), headquartered in Hong Kong, is a global professional third-party certification body & audit firm with operators spanning China, Asia, Middle East, Europe , Africa & South America. ESTS specializes in one-stop social responsibility solutions, not only detecting problems, but also solving problems. Our services include social accountability certification (SA8000),quality management system certification(ISO9001, ISO14001, ISO45001, ISO27001), social audits (including SMETA audits), social solutions (E-learning, capacity building, CAP reviews etc.), security audits, quality audits, environment audits, and innovative services (sub-tier supplier social program solutions, WeChat communication management) etc. ESTS serves a lot of famous retailers, brands and NGOs around the world.