Why do you say, "what is it like to dance out of a clear shadow?" Prove that Su Shi's thought of joining the WTO has defeated his thought of being born?

First of all, this sentence means "dancing under the moon to enjoy the clear shadow, how can returning to the moon palace be compared with being on earth?" (Baidu Encyclopedia)

Dancing for shadows depicts the scene of playing in the sky, which indicates the world, so it is an idea of being born.

The second half of the sentence says "how about on earth", which means that it is not as comfortable as on earth in heaven, which means joining the WTO, so it is the idea of joining the WTO.

Because "how" means not as good as, so the focus of the two sentences is on the second half, that is, joining the WTO, which proves that Su Shi's idea of joining the WTO has defeated the idea of being born.

I hope I can help you ~!