The tension here is that the Chinese know if they hold out until the election, there is a good chance Trump will lose and they will be able to deal with a weak democrat. They already own Biden, and probably all the rest of the serious candidates.
Trump, to his credit, sees this and pulled out his big gun, the threat of massive tariffs. They are win/win for us because we get to reap the revenues from taxing the shit out of Chinese imports and we ruin their economy. So waiting for Biden has massive costs for China.
Who blinks first? Best case scenario for us is that no one does. Then we hit them with the tariffs, which will inevitably alter the global trade framework. We can move away from the disastrous multilateral trade regime, eg WTO, and pursue our own interests.