As he walked past the cave walls, Li Du kept seeing colorful images.
In front of him was a drawing of a red buffalo, surrounded by small figures from all directions. They were simple matchstick man drawings.
The little men were holding sticks, and the bison had sticks stuck in its body. The whole clearly depicted a hunting scene.
Looking at the painting, Li Du reached out his hand and touched it. It was not actually painted, he realized, but chiseled in stone. Then the lines were daubed with red pigment. It was still well-preserved even after so many years.
He knew these were rock paintings, but he didn't know which era they were from.
Petroglyphs were a kind of stone carving culture. Ancient humans used stone tools depict and record their life and struggles with rough, simple and natural stone carving methods.
