Binlang Islet is an islet located in Lieyu Township, Kinmen County (Quemoy), Taiwan (ROC). The islet can be seen from the shore near Lingshui Lake and from the shore near Shaxi Fort (沙溪堡) in the southwestern part of Lesser Kinmen (Lieyu) as well as from Siming District, Xiamen (Amoy), Fujian, China (PRC). The highest point on the islet is 47 m (154 ft) above sea level.

The areca nut or betel nut is the fruit of the areca palm, which grows in much of the tropical Pacific, South Asia, Southeast Asia, and parts of east Africa. It is not to be confused with betel leaves that are often used to wrap it.