WangMin There is an official example project on how to make a spinning coin, which you can find here: https://esotericsoftware.com/spine-examples-coin
However, this is using a clipping attachment, which is fine if the finished animation is output in video format, but if the output is in JSON or binary format and the animation is to be played back with the Spine runtime, then using clipping attachments for large numbers of coins is not good for performance.
In that case, it is better to prepare a frame-by-frame animation of the rotating coin and animate it as a sequence attachment: https://zh.esotericsoftware.com/blog/Spine-4-1-released#%E9%80%90%E5%B8%A7%E5%8A%A8%E7%94%BB
