'Chinese analysts' disagree on comparison between Ukraine and Taiwan.
Instead of Taiwan, the closest analogy would be Mongolia or Vietnam if they sought US-alliance on China border, and China citing past shared history, culture, geography to restore imperial control over Mongolia/Vietnam. Which is obviously bullshit and requires massive revisionism and mental gymnastics. You can't take Russian propaganda on "Muh Blood brother" irredenticism/revanchism at face value.
Yes, because China didn't have a conflict with Vietnam in 1979. Don't be silly.
China attacked Vietnam and immediately left in 1979. It didn't stay forever using a weird mix of 'Muh blood brother' mental gymnastics in Vietnam like Russia is doing in Ukraine, even though China probably has better claim to Vietnam than Russia has on Ukraine. The Vietnamese state was founded by a Qin-dynasty general and Vietnam was a province of China for almost 1,200 years and Vietnamese Emperors were calling their subjects 'Han people' as late as the 18th century. (I'm not supporting irredentism/revanchism, I'm just proving any nationalist can make up any BS to justify annexation)
I would say its pretty easy as in both terms of the Russian areas of Ukraine and the Island of Taiwan, there is a common theme of returning territory seized or seperated and now being held in the Anglozone being returned to its rightful Motherland. Hence it is the historic passing of Russian territory to the Ukraine that was the act of separatism, not Putins current program of bringing back the Individual Republics concerned.
The
(basically Chinese gov't approved) have publicly said there was
no comparison between Ukraine and Taiwan.
Rather than Taiwan, a better comparison would be
Outer Mongolia after Qing-collapse, PRC (reluctantly) recognized Mongolia as sovereign independent countries in a legally-binding treaty despite their legacy part of Qing/Yuan dynasties. Just like Ukraine was formed post-Soviet collapse, Russia (reluctantly) recognized Ukraine as a sovereign independent nation, despite legacy as part of Tsar/Soviet empires. Some Chinese nationalists even push for reunification of Outer Mongolia, which is not much different from Russia nationalists advocating for restoration of Ukraine into Russia. Taiwan was never an ex-colony, never recognized as sovereign, and is part of an unresolved civil war. Taiwan is not "Lost territory" like Mongolia or Vietnam which declared independence and was accepted by China as independent. China never accepted Taiwan as dejure independent and Taiwan even claims to be "China" whereas Mongolia/Vietnam doesn't want anything to do with China, which is similar to Ukraine.
Now imagine if Mongolia/Vietnam sought US alliance with US troops on China's borders, how would China react? It will likely use massive economic and even punitive military attack (1979 war) to dissuade any alliance containment. But would China annex any territory using a weird amalgam of "we were part of Yuan dynasty together", "we share similar culture, Buddhism", and "Chinggis Khan was Chinese emperor"? NO, that is some bullshit weird revanchism/irredentism mental gymnastics that doesn't make sense. It's borderline 'Korean-insanity' with their claim that all things like Confucius has 'Korean-origin'. However, Russia is invoke "Blood brothers", "Shared Culture", and "Shared Kievan Rus" history to justify annexation of Ukraine. This is why Russian propaganda on "Muh Blood brothers" is so troublesome, because it's based on flimsy anecdotes and is not remotely comparable to Taiwan, which is exact same Han ethnicity, same Mandarin language, same characters, literally the same people. Ukrainians/Russians are almost as different as Mongols/Vietnamese vs. Chinese.