Longchi Tianxia's flagship product is the intelligent self-service car washing machine, which is a self-service and convenient car washing equipment that allows car owners to experience cleaning their cars themselves. The car washing machine was launched on the market in 2017 and has won unanimous praise from customers for its convenience and cost saving. The car washing machine mainly uses swiping, coin inserting, WeChat payment (or Alipay payment), etc. to complete the payment, and operates the corresponding buttons according to the panel instructions to complete a number of car washing processes including clean water, foam, vacuuming, hand washing, disinfection, etc. The device adopts a 24-hour unmanned self-service mode, and customers can arrange to wash their cars at any time according to their own schedule. Washing a car takes about 10 minutes and the price is reasonable. It adopts a comprehensive billing method based on traffic and time. An independent backend system, where each device can adjust the washing time and amount based on local consumption. Daily revenue, consumption amount, and machine status can be viewed in real-time through a mobile app. This car washing machine project is a great project for energy conservation, environmental protection, and benefiting the people! A new convenient self-service car washing service that allows car owners to complete their car washing tasks freely without being limited by time or environment.