That is true but IMO China's holding go USD foreign reserves of...

That is true but IMO China's holding go USD foreign reserves of $3.23 Trillion
is significant and if you add the $1.1 Trillion US Treasuries, that takes the total to
$4.33 Trillion.

https://tradingeconomics.com/china/foreign-exchange-reserves

Conversely the US holds about $129 billion in foreign reserves

https://www.investopedia.com/terms/f/foreign-exchange-reserves.asp

IMO if China dumped its USDs & Treasuries on the market it would
knock the ass out of the Greenback. I guess that's their big bazooka
should the UD bung full economic sanctions China.