Attestation Declaration	Detec the Diameter of Photo-catalyst in SCUT	Chinese Quality Attestation Center
Guangdong Test Center of Product Quality Supervision	Guangdong Test Center of Product Quality Supervision	Beijing Pony Center for Physical and Chemical Analysis
Beijing Pony Center for Physical and Chemical Analysis	Beijing Pony Center for Physical and Chemical Analysis	Beijing Pony Center for Physical and Chemical Analysis
Chinese section college physical&chemistry researcher center on Anti-bacteria	Chinese section college physical&chemistry researcher center on Anti-bacteria	Green Whistle stop
Indoor Environment in Guangzhou Monitor Committee.	Nanxin Hotel	Lei Feng Construction