Beijing Zhongchuangxi technology research center invented a kind of environment-friendly surface alloy catalytic solution. After being soaked in the solution, the surface of metal or nonmetal becomes brilliant and rust-resistant. The solution not only maintains the metal's mechanical characteristics, but also improves the hardness of the surface by 2-5 times. If applied to nonmetal, it can produce colorful effect. The solution is cheap and has passed the state examination. Experts believe it have a large market and will bring a revolution in China's material surface treatment.