C716 Chengdu Liu Zhang
Yi Prefecture, Chengdu.
Yi Prefecture originally was a barbaric land, and at first did not belong to China, but after Qin general Si Ma mistakenly cut down Shu, Shu into China. Because Han Gaozu's foundation was Sichuan, he had sent troops to suppress the Three Qin Dynasty. Therefore, he valued Bashu very much, especially since Prefect and Li Bing had dug up the Dujiangyan River