Personally, I fail to see why many Marxist-Leninists support multipolarity. The primary goal of the Leninist movements has always been “workers of the world unite!” and not “non-US-aligned countries unite!”.
To be clear, in saying this, I am not endorsing US-led unipolarity. I am just saying that multipolarity is not inherently good as some MLs suggest. For example, the world in 1914 and 1939 were without a doubt multipolar, and those both resulted in brutal world wars which killed millions.
Could somebody explain why people support multipolarity so much?
Maybe I’m miss attributing this to Mao. However, the strategy employed by the Sinos is described by historian Jeremy Friedman. He described it as a Moa position if I recall. You can hear him talk at length about the Sino Soviet split here:
https://americanprestige.supportingcast.fm/listen/american-prestige-1/unlocked-the-sino-soviet-split-primer-w-jeremy-friedman
https://americanprestige.supportingcast.fm/listen/american-prestige-1/e207-the-sino-soviet-split-pt-1-w-jeremy-friedman
https://americanprestige.supportingcast.fm/listen/american-prestige-1/e207-the-sino-soviet-split-pt-2-w-jeremy-friedman
Part of the split according to Jeremy was due to this conflict in strategy regarding the third world and developing nations.
I have his book about the split, Shadow Cold War: The Sino-Soviet Competition for the Third World, in my reading list, but haven’t gotten to it yet.
That said, the belt and road sounds very rooted in what you quoted from Mao.