Introduction to Liucheng Castle: Liucheng Castle was built during the Jiajing period of the Ming Dynasty to resist the invasion of Japanese pirates. The entire city wall is made of natural stones and cobblestones. The city wall has a circumference of 1127 meters, a height of 5.6 meters, and a thickness of 4.6 meters. It has three gates in the east, south and west. Due to the old days' feng shui, there was no north gate.