China has for several years been the biggest buyer of Iranian oil, putting its purchases in the spotlight as the U.S. threatens heavy economic sanctions on Tehran.
Treasury Secretary Scott Bessent was scheduled to hold a press conference at 1 p.m. EDT (1700 GMT) on Monday.
Following are key details on China's oil trade with Iran, which last year averaged 1.4 million barrels per day, according to ship-tracking firm Kpler.
The U.S. renewed its blockade of Iran's ships and ports on July 13 in an attempt to cut off oil sales as a deal to halt their war broke down, throttlingIranian exports.
There have been no visible crossings of the Strait of Hormuz since then, according to Kpler data, although many vessels turn off their location transponders, making them difficult to track.
Shipments fell to 785,000 barrels per day in June, the lowest since February 2023 and probably rose in July to 823,000 bpd, but the intake so far in August has dropped to 534,000 bpd, provisional Kpler data showed.