President Trump said on Friday that China is violating the "fast deal" it made with the nation to pare back tariffs during negotiations.

President Donald Trump said Friday that he will no longer be “Mr. NICE GUY” with China on trade, declaring in a social media post that the country had broken an agreement with the United States.

The bad news is that China, perhaps not surprisingly to some, has totally violated its agreement with us," said Trump.

Beijing has high hopes for its C919 single-aisle jet after years of delay, but the plane depends on engines, avionics and other gear from Western companies.

The Tianwen-2 mission by China targets asteroid 2016 HO3 to gather samples, with plans for future missions to Mars and Jupiter, enhancing space exploration efforts.

The U.S.-China trade truce in Geneva earlier this month hinged on Beijing agreeing to resume crucial mineral exports. Now China is slow-walking the concession, and the pact is in jeopardy.

China called on Saturday for its automotive industry to halt brutal price wars, as a threat to the sector's health and sustainable development, after key executives jousted over pricing pressure following large discounts offered to buyers.