Taiwan and Hong Kong were ripped away from China by European colonists, you ignoramus. Hong Kong was occupied as a British colony after the British dominated China during the Opium Wars, you know, that century that started when China decided to ban opium since the Europeans had gotten 60% of the Chinese population addicted and Britain decided to run gun boats through the coast terrorizing and destroying until they sacked the capital, stole and destroyed priceless history, and then forced the Chinese at gun point to re-legalize the drug AND grant ALL Europeans immunity from Chinese law within the 5 major ports?

Taiwan was the last theater of the Chinese civil war until the British and US navies intervened to protect the KMT and their favored comprador, Chiang Kai Shek. They wanted to ensure another Chinese army could go back and take over from the communists eventually so they protected, funded, and armed the KMT while it prosecuted the White Terror for 40 years, killing hundreds of thousands of political dissidents and indigenous Taiwanese.

Returning Hong Kong and Taiwan to their integrated status with China is DECOLONIZATION