Invention Patent: A Colorful Foam Water Curtain System for Car Washing Equipment and Its Operation Method (Patent No. ZL 2016 1 0040353.3), independently developed by Hangzhou Leisu Cleaning Equipment Co., Ltd. The system realizes gas-liquid mixed foaming to form continuous foam water curtain with dynamic colorful lighting. It integrates efficient pre-washing performance and stunning visual experience, equipped on all LEISUWASH intelligent car wash machines.