For China long term development, a trump trade war is actually beneficial.
The people who voted trump in are blue collar and they want manufacturing jobs.
But it can't have both ways. In order to gain blue collar works, Trump will lose high tech jobs as China will ban US high tech as well as US allies high tech products in China market and have domestic ones replacing them.
Short term wise, China will lose alot of money in trade and cause unemployment but it will gain a great deal in hightech replacing US high tech products especially semiconductor, equipments, and airplanes.
Trump advisors,and the media all telling Trump not to start the trade war but those people represent the elites, upper middle class but Trump has to answer to people who voted him in, the blue collar workers.