Chengdu Drainage Co., Ltd, the subsidiary of the company has more than 30 years of professional experience in operation management, it has business scope integrating investment, construction, operation and development with good ability in terms of risk control and emergency response, and won "National Operation Management Advanced Unit of Urban Sewage Treatment Plant " and "National Top Ten Operation Units".

Sewage treatment includes urban domestic sewage, rural domestic sewage and industrial wastewater treatment. The sewage treatment capacity of plants in operation, under construction and the plants will be built exceeds 4.3 million tons per day, ranking first in western China and forefront in China.

The business scope covers downtown Chengdu, Bazhong, Shenzhen, Lanzhou, Yinchuan, Xi 'an, Ningdong, Shijiazhuang.