Heh. Here are two real takeaways from the trip:

1. No big trade deal.

A fair criticism, this. Had a chance to get something done and didn't.

The big one:

2. China isn't going to do jack squat to help Iran.

For those who want to push back on this and claim the opposite, don't:
-They didn't object to the blockade
-They agree Iran should never have a nuclear weapon
-They agree that the straits of Hormuz are international waterways and that there shall be no tolls or other impediments to the free flow of energy

According to Trump China even offered to help remove Iran's enriched uranium with their own people.

From Air Force One right after takeoff Trump reiterated the same stance he's had on Iran, which means that if Xi was trying to pressure him one way or the other it didn't work.

For those who want to think that China has all the cards, you should re-think that. They are *very* heavily dependent on foreign trade and open sea lanes. Right now they feel a slight amount of pressure on their collective nuts with respect to the oil blockade. What happens if they invade Taiwan and that turns into a full-blown vice-grip amount of clamping force?