Cavers make rare finds in Guangxi expedition
Updated: 2016-03-10 10:03
By Chen Liang, Zhang Li(chinadaily.com.cn)
An insect inside the caves. [Photo provided to chinadaily.com.cn]
They measured an underground cave tunnel that is said to have been used by military in ancient times.
They found that the tunnel is 1,992 meters long, stretches in a vertical range of 108 meters and recorded the traces of military use that need further research by archeologists.