I can't find a source, but the main one I remember is that all profits made in China had to stay in China.

Edit: this is something I read on a comment here and seem totally unsubstantiated. However Bloomberg reports some of the conditions here. https://www.bloomberg.com/amp/news/articles/2019-07-30/tesla...

It seems they have a pretty big sword hanging over there head, but I don't know how it compares to the usual conditions.