I was just reading about Kharg Island. It wouldn't be about the Strait so much as completely cutting off Iran's oil exports. Apparently they are still selling some oil and the Allies want to cut that off. A Chinese representative has now called for the Strait to remain open, as they are the ones being most impacted by the Strait's effective closure. If you have seen the miles-long gas lines in China, you will see the impact. China has now lost Venezuela and much of the Middle East oil, so they are suffering. I suspect, but do not know, that they may be getting some of Alaska's oil since I have been told that a bit of our oil is going to China for refining since the environmentalists in Washington state don't want it there where it has traditionally been refined.
China is unstable right now. Leadership (military and civilian) is almost in the same state of fear as their North Korean counterparts, and is marginally more competent. The young folk are tired of the repression, and they see everyone else getting freedom while they have none. This war harms China on so many fronts. The article is behind a paywall, and I can't find an archive copy. Here are bullet points:
-Military leaders are being talks to privately to discuss their position on the war
-High-ranking officials are being told to learn from the collapse of the USSR
-There has been a purge of high military officials
-A controlled military is the foundation of internal power
-The loss of Ali Khamenei is significant to China
-They grossly underestimated our ability to get the job done
-There's a real estate crisis (not that you would want to risk your life in Chinese architecture)
-Official youth unemployment rate of 17%...ignores rural regions and is likely understated
-A backlog of unpaid wages
-Bejing is bleeding residents/migrant rural workers who are looking elsewhere for work
-Social media censorship/suspended accounts over the war, internal leadership change, economics
-Birth rates are a continuous issue
The war and tariffs have hurt China economically, but the loss of Khamenei represents a much more significant political loss.