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

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.

Tariffs were a defining promise of President Donald Trump's campaign, and they have been a defining feature of his second term in office. But just over five months in, many of his tariff proclamations haven’t turned into reality.

Beijing said the decision to “aggressively” revoke Chinese student visas would “damage the image and reputation of the U.S.”

Trump administration officials are getting a second chance to try to sever ties with China by starting a trade war, imposing export controls and revoking student visas.