Like I said, there are a lot of people how are very active thinker sensitive to ideas and like to predict future with their young inexperienced mind. They jump at every little info, and always churn out these unrealistically extreme bright and/or extreme dark future. It's jittery and annoying (一惊一乍).Russia does not have enough troops to conquer Ukraine.
And what exactly do you think it means for China to be next? Do you think America is going to invade China? Do you think Europe is going to do that? What can these countries really do? What are you afraid of?
If Russia did not invade Ukraine, what kind of terrible things do you think were going to happen to China?
They just need to practice critical thinking for a while longer. It's a good start, better than being apathetic.