Guo Pu
The "Shanhaijing" commentary by Guo Pu (276–324 CE) compares the "ba" snake with the southern "ran" "python", which after eating a large animal can wind around a tree trunk and expel the bones from between its scales and notes they could grow up to a length of 100 "xun" (about 270 meters). Guo's commentary likewise notes this exaggerated length for the "changshe" "long snake" that the "Shanhaijing" locates on Daxian Mountain "Mount Bigwhole": "There is a snake here named the long-snake; its hair is like pig bristles. It makes a noise like a nightwatchman banging his rattle".