I think there is more to the trade war than we are being told. America is a democracy and any policy that hurts citizens directly will lead to disapproval among the American public. Therefore, Chinese increasing tarrifs on American agricultural produce will hurt American farmers who in turn will blame Trump. However, history says slot about how Americans can be cunning. I think America aims to weaken the communist party of China. Through out history America has always won by destabilising Governments. You see the Communist party of China asserts great power over its citizens by having tight control of the population. In China each and every aspect of the population is closely monitored by the state hence rebellions are dealt with before they become too big to handle. This is what ensures the Communist party has a tight grip of power. Anything that threatens such hold of the power is eliminated hence there exist no political opposition in China. America this and could use the trade war to destabilise the government bringing down the entire Political structure of China. It may not be simple but they have done it several times on countries such as Iranq and can do it again
And that is their Big Picture in the game. They are betting on Trump losing 2020.
If that fails then they might soften their stance. If Trump goes home next election, Beijing will loosen many economic concessions and become very friendly to the new regime and trade will flow better. I am betting with them drumpf is going home.