▲ Sewage operation certificate - Level 3

▲ Domestic sewage operation certificate - Level 2

▲ Industrial wastewater treatment - Level 3

▲ Industrial wastewater treatment - secondary

▲ Wastewater, waste gas, noise control qualification certificate - Class A

▲ Wastewater, waste gas treatment certificate - Class A

▲ Waste gas, waste water treatment certificate - Class A

▲ Automatic continuous monitoring (water) Level 3 certificate

▲ Wastewater, waste gas, noise control qualification certificate - Class A

▲ Environmental pollution control - Noise - Class A

▲ Operation and maintenance management of ecological environmental facilities - Class A

▲ High-tech enterprise certificate

▲ Science and technology enterprise record certificate

▲ Environmental Protection Industry Association membership certificate

▲ Environmental Protection Association member governing unit

▲ Governing units

▲ Environmental protection industryMembership certificate 

▲ Safety production license

▲ Garbage collection permit

▲ Business License

▲ Pollution control - domestic sewage treatment - Level 3

▲ Pollution control - Industrial wastewater treatment - Level 3

▲ Municipal and environmental contracting - Level 3

▲ Urban fecal sewage operation certificate

▲ Quality management system certification

▲ Environmental management system certification

▲ Health and safety management system certification

▲ After-sales service certification

▲ After-sales service manager certificate