There is a typical sea erosion landform in Chengshantou. The sea cave is a horizontal and tunnel-shaped cave at the bottom of the sea cliff. It is located between the high tide and the low tide. The destructive waves continuously impact the coast. The rock is covered between the high tide and the low tide. Due to the wear and tear of alternating wet and dry, hydraulic action, dissolution and abrasion, the flow hits the weak zone between the high water level and the low water level through hydraulic action and abrasion. The erosion is concentrated on the weak line, and the weak line is thus widened. Deepen and form a hole in the formation of the team. The whole island before dawn arrived in the darkness, the sky and the earth were quiet, only the waves crashing from the shore reefs from time to time, especially in the boundless darkness. Blowing the sea breeze on the quiet coast, waiting for the first golden color to appear on the horizon, slowly and slowly, the kapok white sky began to be red, a small piece to a large piece, and then An entire sky. Its not so thrilling, but its like the gentleness of Mr. Zhimos pen, which has captured the hearts of travellers.