Depending on what point of the PoW timeline you do this then something might be cooked up for China. Given that since it was largely a single-party state with a large degree of hegemony among it I don't know how well parties would have worked. But fast-forward it to the eighties and you'd have an election spirit with Hou opting to step down. To that effect you would have:

The Houists - These'd be the "centrist" communists that have long ruled under Hou under the pretense of an official "Zero Party" policy, but in reality were an invisible national party. Hou Sai Tang was their leader and their ideology reflects a good deal of Sinocentralism with broad social liberty.

Auyi Clique - The clique associated with Zhang Auyi, the third Agricultural and Social minister, a young and spry "liberal"-communist reformer. He might be more in line with democratic election principles with a heavy dash of socialism. War is to this clique a means to reinforce China's moral obligations as opposed to maintaining some sort of empire (ie, ally defense).

Xhu Clique - Associated with the long-reigning Ministry of industry, the Xhu Clique is probably most closely compared to old-school and hard-core Maoism or general Bolsheveikism. Absolutely atheist they're likely to want to enforce a stringent policy of social uniformity and absolute rejection of everything bourgeoisie. War to them is a fulfillment of ideological principle otherwise retired by the Asia-only Houists and only brought to light for morale reasons by Auyi. They would march Europe if given the chance.

If you needed a fourth then I would have to maybe say the old Imperialists or the Nationalist-Republican old guard. But they're so irrelevant to China they basically don't exist so their support might as well be 1%-1%>

The other parties could be shown with either equal splits with Housim though at the head. Failing any sort of traditional elections you could tie it to a series of events where at the end Mang Xhu or Zhang Auyi is elected Chairman of New People's China.