Beilun River. Originated from the flame mouth of Tansan Village in Dongna Township. Originated in Beilun, Banpai and other places, with a total length of 107 km. It meets in Dahe Village, Liang Na Town, then flows southeast from Dahe Village, meets Liangna River in Baidie Village, flows through Bai Chan, Wangxing, Sanlong, Bai Tao, Tanleng, Gouweilai and other villages, and reaches the southwest of Dongxing Street, where it is divided into two tributaries: one flows southwest, passes at the foot of Jianshan Mountain and enters the sea in Mang Street, Vietnam; One flows southeast, joins the Luofu River in Luofu Village, and then flows to Zhushankou for sea. This is the border waters between China and Viet Nam. At Dongxing Street Branch Road, the direction is blocked by beach stones, and the water flow is fine. During the Guangxu period of Qing Dynasty, the gentry and the gentry were different. After twenty or thirty residents, I had to send more than 200 people to help Cai, the former battalion commander of the prefect army, and Yang Ruishan, the governor, to pick up the beach stones on both sides of the river, so that the water began to flow and sailboats could come and go.

Beilun River (14) Nariang River. Originated in Damian Mountain, it flows through Liang Na Street, where Fanhe meets Tansan River and enters the sea through Dongxing. The waterways are winding and there are many stone beaches, among which Tiger Beach and Lantern Beach are the most dangerous, and the "beach boat" can reach Nariang Street.

The beach scattered the river. For Fangcheng County and Yueshui River, it originates in Montenegro, flows through its Na and Jialong, joins Beilun River, then flows down to Zhenfanhe Village, joins the river, and goes to sea through Zhushankou of Dongxing. The beach boat can reach Tansan Street Pier. The river has spread from the beach to Dongxing, with 56 stone beaches, of which Niue Beach, Shuanglong Beach, Fanhe Bottom Beach and Denglong Beach are the most dangerous.