A few years ago, there was a thread on this subject, but it had no replies. It seems like a fascinating idea, so I'm creating a new thread.
I would guess that this would require Mao's death pretty early on, in 1966 or 1967. Also the most radical Red Guards would never be able to defeat the PLA. Large numbers of soldiers and officers would need to defect. What changes would be necessary, and how could they be brought about?
During the Cultural Revolution in China there arose a number of factions who argued that the CR wasn't going far enough, and that the primary contradiction in Chinese society was between the party-state and the masses. Rather than just criticising "reactionary ideas" and "bad cadres", as the Maoists argues, the ultra-leftists argued that the Cultural Revolution needed to give way to a political revolution against the party-state. Examples of ultra-leftists include the Shanghai People's Commune, which Mao initially supported until they started questioning the political authority of his allies, whereupon it was replaced with a Revolutionary Committee subordinate to Mao and his allies, and the Shengwulian Manifesto written by Xiaokai Yang in 1968, who Mao personally denounced as counter-revolutionary in 1969.
Ultimately these ultra-leftist tendencies were denounced by Mao and the CPC as counter-revolutionary and anarchistic in nature. Later, after Mao's death, the CPC would go on to denounce Mao as an ultra-leftist in 1978.
The challenge is this: Get the ultra-leftists to successfully escalate the Cultural Revolution into a political revolution, resulting in a China based on radical democratic and libertarian socialism.
I would guess that this would require Mao's death pretty early on, in 1966 or 1967. Also the most radical Red Guards would never be able to defeat the PLA. Large numbers of soldiers and officers would need to defect. What changes would be necessary, and how could they be brought about?