That was a direct consequence of the PRC's decision to attack the UN coalition army in Korea, and is the result of another failed policy of the PRC.
As I said, the PRC's policies are what drove its people into poverty. It was a choice the PRC made to attack the UN armies, it chose to do so fully aware of the consequences of supporting North Korea and Kim Il-sung.
Which led to almost everything that happened in my post, the UN had already refused to acknowledge China. Nothing factually untrue in it at all.
>it chose to do so fully aware of the consequences of supporting North Korea and Kim Il-sung.
Mao called the decision blackmail at the time, and it's a fairly apt description. Imagine the hell that would be raised if China helped a Mexican despot and marched an army to the US border.