I wanted to mention that the situation in Ukraine is different than that of Taiwan. Ukraine was a province of Russia ever since they decided to be under the Russian Tzar Alexei. That i it has been a part of Russia for more than 300 years. Taiwan was never a part of China.
But there i something more to it than that. Ukraine tends to have a lot of people that would rather be under Russian rule a I found out to my great surprise when I lived there for many years and very often asked people what they thought of the present rule from Kiev as opposed to rule from Moscow. But no one in Taiwan wants to be be under the boots of China--especially after they saw what happened in Hong Kong.