Trump didn’t do anything with regards to China the first time around. I think there’s reason to doubt he is opposed to China in any significant way.
In his first administration he engaged directly with North Korea which has been widely regarded as a Chinese puppet state. The last thing China wants, in my opinion, is a united and free Korea.
He did impose tariffs on imports from China.
https://en.wikipedia.org/wiki/China%E2%80%93United_States_tr...
China–United States trade war
An economic conflict between China and the United States has been ongoing since January 2018, when U.S. President Donald Trump began setting tariffs and other trade barriers on China with the goal of forcing it to make changes to what the U.S. says are longstanding unfair trade practices and intellectual property theft.