"Undercut America on pricing" AND develop better technology in the long term
This is by far the best approach.
China, as the rest of the world, simply cannot oppose US with the same tactics / behaviors of US. US is bullying, but would love if China would reply in a questionable, not legal way. So that US would have a good excuse to go full steam against China.
The reality is that US is the superpower nation, the hegemonic nation in the world, and this gives US huge privileges. See what happened to US when went to Afghanistan and see what is happening now to Russia for Ukraine crisis. Totally different response by "the world" and totally different price to pay, although both wars have been unjustified to great extent.
The US is the boss now! So currently the hard reality is "rules for thee and not for me". China cannot avoid to following the rules, as it has always done til today. Breaking the rules to counter US with same weapons is a trap. Us would love it!