Trump is quite concerned that Chinese companies acquire technological leadership.
Until a few decades ago it had been the main producer of both industrial inputs, but the growth of other countries, particularly China, was displacing it from that position.
It is no coincidence that Trump is imposing these protectionist measures abruptly, but is part of a series of more general sequence of events.
The global economy is one step closer to full trade war if the United States puts its threat into action to impose tariffs on the rest of imports.
The problem is that the expectations were actually met. The growth of the Chinese economy was exponential.
It all in December 2016, at the beginning of his mandate, when the president of the United States proclaimed his goal to put "America First" (America above all).