The ecological zone of Luxi River follows the construction concept of the city of sponges, combines topography and relief, collects and infiltrates surface rainwater by collecting ditches, reservoirs and rainwater gardens, and creates the system of artificial sponges of wetlands with "natural accumulation, natural infiltration and natural purification" Ecological zone of Lake Xinglong and Luxi River, as a global project of ecological water management integrating the fight against floods, irrigation, ecology and landscaping