After end of this virus breakout (say after 3 or 4 months) the positions of the major countries in the world will be reshuffled. How to fight the trade war will be a new challenge for both US and China. "Easy to win" probably not is in the picture anymore. At this time it is hard to predict who will gain more advantages from this virus breakout. Remember, US has nearly 7 million people lost their jobs now and the number will increase in the coming weeks. China already started to make products again since the virus breakout is mostly under control but where is the market beside their own 1.4 billion customers? On the other hand, after spend $2.2 trillion how strong the financial power left for US with an unacceptab high unemployment rate.? Will US still be a good market for other countries including China? Will US dollar still keep its dominate position in currency or wil share its position with other currencies after the current oil war?
Anyway, "market", will play a very major factor of the trade war. (((((So the size of the market matters.)))))