State Councilor Yang Jiechi talked with US Secretary of State Rex Tillerson on Thursday over the phone about the Iran nuclear issue ahead of an announcement that US President Donald Trump is expected to make about a 2015 nuclear deal.

According to US State Department spokeswoman Heather Nauert, Tillerson also spoke to French and Russian foreign ministers on the same day and to British Foreign Secretary Boris Johnson "in recent days".

Foreign Ministry spokeswoman Hua Chunying on Friday reiterated China's position on the issue, calling all the parties to continue upholding and implementing the deal.