南系岩画大都以红色涂绘，颜料是以赤铁矿粉调合牛血等而成的。

Most of them are painted red with bloodstone powder and ox blood.

youdao

南系岩画大都以红色涂绘，颜料是以赤铁矿粉调合牛血等而成的。

Most of them are painted red with bloodstone powder and ox blood.

youdao