We have heard much of the increase in oil prices in 2008, food prices, and nearly all the living materials around us are going up crazy. It is foreseeable that the future era is one of extreme deprivation. Projections: future scarcity of fresh water is the primary constraint on economic development. At a microlevel, per capita surface water is one sixth of the national average. Car wash water is estimated at 1. 2 million cubic metres per year, which means that only car wash water is to be washed, and seven qingqing lakes are to be washed each year, and the promotion of water-saving car washes is imminent, in which case the kantian company has introduced foreign** technology to integrate and develop successful water-efficient and environmentally friendly car wash equipment and products. The equipment is small and environmentally friendly. We have also promoted it as a car wash service. On a macro level, the total number of domestic cars is nearly 40 million, while the total number of...