Is the glue used by carpenters donkey skin?

When I was a child, I saw Niu Pijiao. I finished reading it. Now it seems that you should be reluctant to use donkey skin, isn't it that donkey skin is very expensive? And you can smoke donkey-hide gelatin.

Cowhide is made of dried cowhide. Cut one piece, put it in a big pot of water and cook it slowly for seven or eight hours. When a big pot of water finally becomes as much as a big bowl, the cowhide will melt and then be concentrated to about a small bowl. After wiping with a brush, brush it on the smooth surface of two pieces of wood, then compact it and stick it together when it is dry.