Slogans for building canals and stations

Dayu didn't enter the house three times to control water. Li Bing and his son built Dujiangyan, as well as Zheng Guoqu, Li Chunjian and Zhao Zhouqiao. Back in the United States, Zhan Tianyou built the first railway in China, and Mao Yisheng built a bridge. As for the story, Zheng was sent to Qin to build a canal to weaken the strength of Qin, but it was discovered by Qin. Zheng explained the benefits of building the canal to the king of Qin and was allowed to continue building it. After the restoration of Zheng Guoqu, agriculture was discovered, which greatly enhanced the strength of Qin.