Why not? The PRC is the successor state. It makes less sense to hand HK over to ROC because the ROC never had sovereignty over HK.

Successor state by force, not by people’s choice. The small part that ended up democratic hasn’t chosen to join the PRC.

	▲	budududuroiu 6 days ago \| parent [-]
		Not only were the PLA and CCP massively popular because of the insane corruption and hyperinflation under the Nationalists, the ROC imposed (at the time), the longest martial law in human history [1] Taiwan is democratic today, because of transitional justice, but at the time when the PRC succeeded the ROC in China, the nationalists led by Chiang were as dictatorial as you can get [1] - https://en.wikipedia.org/wiki/White_Terror_(Taiwan)