The donkey is blindfolded and walking in circles, grinding something white between the two stones. There was some speculation that it might be rice, but Diana reckons it's millet, and now she mentions it, that makes more sense, doesn't it: rice is grown in the south, and millet in the north, I believe. Correct? All thoughts on this matter are welcome!

By the way, the previous morning in Simatai, we'd seen people doing the job of the donkey. Some of our party stopped to photograph them and got shouted at. :-)