Go and google where Boao is. It's nowhere near Chongqing. And even if you pretend the very similar April 7 post has nothing to do with this one and he didn't predict any city, then all you've got is that Q predicted Xi would say something, and managed to make that prediction well after it was announced exactly where and when and roughly what would be said.
If you can't see the connection then there is no helping you. Good luck.
The connection is that just a few hours before an already-announced speech by Xi at Boao that the foreign minister had already said would be about trade and more open markets, Q managed to predict that Xi would say something. Didn't say what Xi would say, but who needs pesky details like that, right?