Introduction to the ruins of Yamen Ancient Fort: The ruins of Yamen Ancient Fort are located on the east bank of Yamen, Xinhui, out to the sea from Yinzhou Lake. meters, in the shape of a half-moon battlement, with upper and lower levels of gun positions, a total of 43 gun positions, tightly guarding Yamen, one of the eight major outlets of the Pearl River to the sea. The ancient fort has repeatedly sunk Japanese and Portuguese pirate ships. On the eve of the Opium War, the governor of Guangdong and Guangxi, Lin Zexu, sent heavy troops to garrison the fort, which deterred the British invading forces. During the Anti-Japanese War, the anti-Japanese guerrillas relied on the danger of Yamen Fort to fight bravely. Japanese invaders invaded; Premier Zhou Enlai visited the Yamen Ancient Fort in 1958.