Jennifer Pak

Zhang's company says he died from sudden cardiac arrest.

He is survived by a daughter age 11 and a wife.

Jennifer Pak, NPR News, Shanghai.

Here's NPR's Jennifer Park.

The two ships, CSCL Indian Ocean and CSCL Arctic Ocean, tried to exit the Persian Gulf but then made an abrupt U-turn near Iran.

It's unusual given that the two ships had Hong Kong flags and signaled they were Chinese-owned.

China is a strategic ally of Iran and has condemned the U.S.

and Israel for starting the war against Iran.

Iran has retaliated by effectively closing the Strait of Hormuz, a crucial waterway.

But it says passage is allowed for friendly nations.

While some Chinese ships have reportedly been able to pass through the strait, China's government has not confirmed this.

Jennifer Pak, NPR News, Shanghai.

Over the past week, China has continually criticized the U.S.-Israeli war with Iran, and that raises questions over whether the China-U.S.

summit will still happen.

On Sunday, Chinese Foreign Minister Wang Yi says China is open to dialogue, though he did not confirm a meeting date.

China and the U.S.

are big countries.

We can't change each other.

China and the U.S.

are both big countries.