Rail transit is a major national asset. Qianjiang High tech is a water paint quality supplier for rail transit OEMs, which has decorated over 4000 rail trains in cities such as Hangzhou, Nanjing, Hefei, Guiyang, Wuxi, and Nantong, helping rail trains become beautiful scenic spots in various places. For many years, whether it is various tests conducted by CRRC or testing and certification by authoritative institutions, Qianjiang water-based paint has exceeded industry standards in various indicators such as weather resistance, hardness, adhesion, and corrosion resistance. Verified by case studies of urban rail transit in different environments across various regions.