What new tools did Li Bing invent?

China National Intellectual Property Administration Patent Library did not find the inventor of "Xian Li Bing". When you are joking, do you mean Li Bing, the magistrate of Qin Shu County during the Warring States Period? He led many people to build Dujiangyan, using the method of mid-stream as weir, and built a stone ridge in Minjiang Valley, called Du Jiang Fish Mouth, also called Fenshui Fish Mouth. Yu Zui is a water diversion project, which divides the Minjiang River into two parts. (quoted from /view/2240.htm)