Beijing Tianheng Integrity Environmental Assessment Center (hereinafter referred to as "Tianheng Integrity Testing") was founded in 1999 and is a comprehensive third-party inspection and testing organization certified by the Beijing Municipal Market Supervision Administration CMA. It is engaged in environmental protection (ambient air, environmental noise, noise source pollution, water quality, waste gas, pollution source wastewater, radiation pollution), building materials (electrical materials, decoration and decoration materials), construction projects and indoor air (indoor environmental air quality, acoustic environment, building energy-saving projects, decoration and decoration projects, foundation and foundation engineering), health and medicine (public health) testing.