Guangzhou Longdai Environmental Protection Technology Co., Ltd. is a national high-tech enterprise and a supplier of municipal sewage and petrochemical industry treatment equipment. It is a specialized environmental treatment company that integrates independent research and development, design, engineering contracting, environmental equipment manufacturing, and environmental material supply in a one-stop service. The company's products have passed ISO9001 quality certification, CE certification, and RoHS certification, and its brand is "Shangyi Ecology".

The main business involves treatment equipment for the petrochemical industry, river and lake governance, treatment of black and odorous water bodies, municipal water affairs, urban sewage treatment equipment, industrial wastewater treatment equipment, domestic wastewater treatment equipment, pure water equipment, reverse osmosis equipment, water purification, and other fields.

The main products include denitrification deep bed filter, biological disc, fiber disc filter, stainless steel disc filter, internal inflow grid, rotary drum fine filter, rotary drum microfilter, sand filter, central drive single pipe sludge suction machine, and central drive concentrator.