i seriously doublt US has the ability of hurting Chinese econemy by that much just by sanction, no matter what they would like to try.I think a successful AR is a foregone conclusion probably since the last 5 years, the question remains is that how painful can the US make such a move. Currently the answer to that question is still extreme/crippling, to the point that it will not be attempted unless there's a drastic change in the status quo by Taiwan/US.
A 10% drop in GDP is thrown around here as something acceptable, but in reality will represent a unimaginable amount of human suffering for the second largest economy in the world.
the china import/export contribute slightly less than 20% of its gdp, and US + EU + Japan combine is less then 6.5%, so that's almost the max damage they can do, but
1, i doubt EU or Japan will fully participate the sanction, china is not like russian which matters in only resource sectors, as EU and JP's largest trading partner and world largest industry country, it will deeply harm the entire world if the sanctrion applied
2, the GDP we are talking about is counted in USD, which is nothing closer to the true economical power especially after what FED is doing at the moment, when any sanction started, i doubt the the USD will remain very stable, and given chinese economy is much healthier than the US, there are way more cards china could play by then