This is confirmed by John Bolton (I guess if you believe what he wrote in his book that the President attempted in court to block).
Trump “turned the conversation to the coming U.S. presidential election, alluding to China’s economic capability and pleading with Xi to ensure he’d win. He stressed the importance of farmers and increased Chinese purchases of soybeans and wheat in the electoral outcome.”
https://slate.com/news-and-politics/2020/08/trump-lies-china...
Trump is schizophrenic on China. His "anti-China" attitudes right now seem more of a function of a need for an external enemy to blame/distract from his domestic failures. His trade war with China occurred around the same time he initiated trade disputed with even allied nations. There are even indications that he is not bothered by, and perhaps even approves of, Chinese human rights violations (e.g. IIRC Bolton has said he expressed approval of the Xinjiang camps directly to Xi).
I believe some of his advisors are more opposed to current Chinese government actions, but Trump's shown a willingness to do foreign policy 180s against their advice before.
Frankly, it doesn't even strike me as that different from previous administrations (it's not like the US particularly cared about what happened to the East Timorese, for example), he mostly just seems more short-sighted, by focusing on money rather than power.
