This thread (Cuban Missile "Crisis" Replay) proved beyond any reasonable doubt that America doesn't appreciate to have her borders militarily surrounded by foreign alliances. You could add to the example presented there, the invasion of Grenada, the financing and political support of military coups, the proxy wars in Central America, etc...
Now I'm gonna prove that China doesn't like to see international troops close to the chinese border either.
In 1950, the chinese foreign minister, Zhou Enlai, spent at least 4 months issuing strongly worded warnings to the international community:
These two gentlemen dismissed Zhou Enlai's warnings as nothing more than empty threats and political posturing:
And the rest is history.
The events that led to the chinese involvement in the Korean War bear a strinking resemblance to those that led to the War in Ukraine if you ignore the fact that the chinese involvement was an accelerated version because there was a hot war going on.
Three russian leaders spent 17 years (War in Georgia) or 31 years (War in Ukraine) warning the West that the expansion of the western military alliance towards Russia's borders would be regarded as a threat to the country's national security.
Just like the warnings of the chinese chancellor, the words of the russian leaders fell on deaf ears. One can't help but remembering the famous quote "those who refuse to learn from history"...
Now I'm gonna prove that China doesn't like to see international troops close to the chinese border either.
In 1950, the chinese foreign minister, Zhou Enlai, spent at least 4 months issuing strongly worded warnings to the international community:
"China is prepared to intervene in Korea
to safeguard its national security."
"China will not admit the presence of american
troops on the korean side of the Yalu River."
to safeguard its national security."
"China will not admit the presence of american
troops on the korean side of the Yalu River."

These two gentlemen dismissed Zhou Enlai's warnings as nothing more than empty threats and political posturing:
"The chinese leadership is bluffing."

And the rest is history.
The events that led to the chinese involvement in the Korean War bear a strinking resemblance to those that led to the War in Ukraine if you ignore the fact that the chinese involvement was an accelerated version because there was a hot war going on.
Three russian leaders spent 17 years (War in Georgia) or 31 years (War in Ukraine) warning the West that the expansion of the western military alliance towards Russia's borders would be regarded as a threat to the country's national security.
Just like the warnings of the chinese chancellor, the words of the russian leaders fell on deaf ears. One can't help but remembering the famous quote "those who refuse to learn from history"...