'hanging pen cave') is a karst cave under the west face of Yin Ridge (印岭) located 7 km (4.3 mi) north east of Lizhigou Town (荔枝沟镇), 15 km (9.3 mi) from Sanya City, Hainan Province, People's Republic of China.
A number of inscriptions carved into the walls of the cave are believed to date to the Yuan Dynasty (1271–1368).
[3] Between 1992 and 1993, archaeologists carried out a comprehensive excavation and survey of the Luobi Cave over an area of 70 m2 (750 sq ft).
Radiocarbon dating techniques show that the finds are from the late Upper Paleolithic era around 10,000 years ago and represent the earliest evidence of human activity in Hainan as well as the southernmost occurrence of stone tools from this period.
The smaller Xianlang Cave (仙朗洞) nearby is claimed to have been the home of female immortal who descended from heaven and married a man from the local Li minority.