On December 3, the Intermediate People’s Court of Guangzhou sentenced him to life in prison for accepting bribes. Qi was also stripped of all of his assets and permanently deprived of his political rights. Under Chinese law, Qi will likely also have to perform prison labor.

https://en.wikipedia.org/wiki/Zhang_Qi_(politician%2C_born_1961)

Seems like the death sentence is not correct.

This one? United Nations Convention on the Law of the Sea (UNCLOS)?

As far as I found out neither the US, nor Iran ratified this.

If you want to argue with law you need to have a law which all states involved follow.

That doesn’t apply here?

The strait of hormus does not lie in international waters. What do you mean by “high sea piracy”?