Urban water purification and urban water supply are problems that must be faced in urban development. This REDE green city pipeline system has improved the problem of urban water and water purification from a new perspective. It is based on the purification function of tree roots, and purifies rainwater by natural filtration as urban water. In the case of sufficient water resources, it can be discharged into the river after simple treatment. This not only simplifies the water purification process, but also greatly reduces the cost of water purification. 2018 Golden Point Concept Design Award