Introduction to the old site of Weiyuan Fort: The former site of the fort managed by the Weiyuan Fort Management Office is located in the southern community of Weiyuan Island in Humen, including Weiyuan, Zhenyuan, Jingyuan, Nanshanshan Peak, Shetou Bay, Eyi and other forts. These forts form a three-dimensional The coastal defense system is known as the "Great Wall of the South Sea".