rock painting in helan mountain, china

abstract activity age amusement ancient animal anthropology archaeology archeology art artistic artwork astronomy axe cart cave cavern chain character china chinese civilization cliff closeup crave crest dangxiang detail dynasty edge encyclopedia engraving entertainment face genital geography god helan heritage human idea inhabit inhabited knife legend life live mongolian mountain myths nationality ningxia nomadic old painting park petroglyph prehistoric range ridge rock sacrifice script stone theme thinking time trap uppermost wild work worship writing yinchuan