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

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。

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

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。

youdao