Trump's tweets come after a Friday tariff hike from 10% to 25% on $200 billion of Chinese imports, along with the unexpected announcement that he would begin the process of raising tariffs on all remaining imports - around $300 billion worth of goods.

On Wednesday, Trump fired off a pair of similar 'act now' tweets - suggesting that Beijing was backing off on trade negotiations because of their "sincere HOPE that they will be able to "negotiate" with Joe Biden or one of the very weak Democrats." 

"Guess what, that's not going to happen!" continued Trump.