Huanxi Pond is the domestic sewage treatment station of Youfa Group's First Branch. Through treatment processes such as A/O biological contact oxidation, sedimentation, sand filtration, ozone oxidation, and ultrafiltration reverse osmosis, it treats sewage to the first-grade standard of Tianjin's Comprehensive Sewage Discharge Standard, with a treatment capacity of up to 200 cubic meters per day. All treated water is used for greening, fish farming, and production reuse.

    The themed mural "Autumn at Tuanbo Marsh" created on the exterior wall of Huanxi Pond, rendered in the style of realistic oil painting, depicts the serene beauty of Tuanbo Lake with its vast misty waters, gently swaying reeds, the water and sky merging in one hue, and hundreds of birds soaring in flight. On the one hand, it expresses Youfa Group's deep love for the pristine land of Tuanbo Lake. On the other, it constantly inspires the colleagues of Youfa Group to make the shores of Tuanbo Lake purer through their own efforts, to make Jinghai a better place, and to contribute strength to the great rejuvenation of the motherland!