You can't compare pears to apples. Tibet and Crimea annexations were quite different.
Crimea used to be part of Russian Empire and then part of the Russian SSR until it was gifted to Ucranian SSR as a region in 1954. A 65% of the residents are Russians, 16% Ucranians and 12% Crimean Tatars. And most of their population speaks Russian (85%). There were tensions between Russia, Ukraine and Crimea thanks to that transfer (and they haven't disappeared). The annexation was a bad thing economically wise but it was done quite fast and clean.
The Tibet was already under Chinese control since the Qing Dynasty (1720). At that time, Korea was also a vassal state of the Qing Dynasty. The Tibet independence (1911-1950) sadly didn't have any strength (obsolete military, bad and few foreign relations) and they were absorbed by the CCP military. Also, they speak different languages, have different cultures and the Han are still a small minority in the region.
Crimea used to be part of Russian Empire and then part of the Russian SSR until it was gifted to Ucranian SSR as a region in 1954. A 65% of the residents are Russians, 16% Ucranians and 12% Crimean Tatars. And most of their population speaks Russian (85%). There were tensions between Russia, Ukraine and Crimea thanks to that transfer (and they haven't disappeared). The annexation was a bad thing economically wise but it was done quite fast and clean.
The Tibet was already under Chinese control since the Qing Dynasty (1720). At that time, Korea was also a vassal state of the Qing Dynasty. The Tibet independence (1911-1950) sadly didn't have any strength (obsolete military, bad and few foreign relations) and they were absorbed by the CCP military. Also, they speak different languages, have different cultures and the Han are still a small minority in the region.