The project transforms the city waste treatment system, including AI trash cans, transfer stations, urban vacant land, and landfills. While collecting bird feces and processing leachate to generate struvite to create scattered city-scale bird-friendly planting green spaces, it also provides filtered, safe and edible garbage for birds. Finally, use urban green corridors to connect scattered ecological green spaces to develop an urban-scale bird-friendly garbage disposal circle. Eventually, a virtuous urban ecological cycle in which birds can be self-sufficient will be formed.