Where is the sea at Hengmen?

Near Zhongshan Hengmen and Nansha Binhai Park. Hengmenhai is near Zhongshan Hengmen and Nansha Binhai Park, and is located near Hengmen Island. Hengmen Island is located at 2 1 km northeast of Shi Qi, Zhongshan City, 1 1.4 km east of Zhangjia Border Region, and 0.4 km southwest from the land. It covers an area of 4 square kilometers. The highest elevation of Hengmen Mountain105m. Originally known as Yizhou. Later, I changed my name because I was standing at the water crossing of Hengmen.