Introduction to Qinqiao ruins: It is said that Qin Shihuang came to Chengshantou on his eastward tour and wanted to build a bridge here to watch the sunrise in the east and search for elixirs. He sent people to transport stones day and night to fill the sea and build a bridge, which moved the Dragon King of the East China Sea. The Dragon King ordered the Poseidon to help build the bridge. Poseidon built a bridge over forty miles in one night. Unexpectedly, the First Emperor broke his promise and asked a painter to paint the Poseidon. When Poseidon noticed it, he immediately destroyed the bridge and left, leaving only four piers.