Not sure Russia, China, North Korea, and Iran are really aligned.
China probably feels the same way about Vladivostok as they do about Taiwan, another territory lost in an "unequal treaty" during "a century of humiliation". They've been on the brink before
Anybody who neighbors Russia is concerned about being overrun with tanks and Spetznaz. Iran was a reliable anti-communist ally of the US in the time of the Shah because of the geopolitical situation of Iran.
All of those countries have an interest in the US and NATO being overstretched, but I don't think China really cares if Russia wins or loses in Ukraine and Russia does not really care if China takes Taiwan.
China probably feels the same way about Vladivostok as they do about Taiwan, another territory lost in an "unequal treaty" during "a century of humiliation". They've been on the brink before
https://nsarchive2.gwu.edu/NSAEBB/NSAEBB49/
Anybody who neighbors Russia is concerned about being overrun with tanks and Spetznaz. Iran was a reliable anti-communist ally of the US in the time of the Shah because of the geopolitical situation of Iran.
All of those countries have an interest in the US and NATO being overstretched, but I don't think China really cares if Russia wins or loses in Ukraine and Russia does not really care if China takes Taiwan.