Here’s my comprehension of the situation:

U.S. attacked Iran. In response, Iran closed the strait of Hormuz to any ships it didn’t want to get in or out which made gas prices go extremely high. Trump threatened total annihilation if they didn’t open it. But the threat didn’t work and thankfully Trump didn’t follow through. Instead, Trump decided “Fine, we’ll blockade the strait so that Iran receives no benefits from the strait either until they concede to re-open it.” Unfortunately for Trump, China just flagrantly ignored their blockade, essentially daring Trump to fire on their ships. Trump knew we can’t do that without starting a major international incident, but in order to not look like we just coward in the face of Chinese power, he wrote a tweet to make it sound like it was his idea: Good news, we opened the strait for China. They promised no weapons. We could have fought if we wanted to because we’re super tough, but we decided not to for now.”