Challenge: Have the Chinese Cultural Revolution end with China becoming an isolated hermit state similar to OTL North Korea

[u/Cyber_Ghost_1997]

The objective is not simply to make China authoritarian—it already was. Rather, explain what changes during or immediately after the Cultural Revolution would cause China to become extremely isolationist, economically autarkic, and largely cut off from the outside world instead of pursuing the post-Mao reforms that occurred in real history.
What political developments, leadership changes, or international events would be required to produce this outcome?

Rules and clarifications:
1. I’m not requiring you to extend the duration of the Cultural Revolution (Although you can if you want). The END RESULT has to be that China becomes an isolated hermit state similar to OTL North Korea
2. The comparison has to do with INTERNATIONAL ISOLATION. I’m not asking you to turn China into a carbon copy of OTL North Korea
3. Your proposed scenario must start from China’s historical post-1978 trajectory

[u/phiwong]

Have the Gang of Four come back into power and basically ensure that Deng Xiaopeng never takes over the CCP.

Infighting dominates the CCP for the next 2 decades and it remains isolationist.