It's simple: the Russian and Chinese governments are actually one.
I mean, think about it: have you ever actually been to Russia and China? I mean, sure you've met people who claim to be "Chinese" or "Russian" online or maybe in the street, but they're all getting paid by the government of the Sino-Soviet Socialist Republic, too. See, there was no Sino-Soviet split, actually, but rather a union — the whole split was actually a farce meant to trick the United States into believing that the socialist world was more fractured than it actually was. The USSR never actually dissolved, and there is no war in Ukraine, either — that's just a way of tricking NATO into giving billions of dollars and countless firearms and so forth to the mighty SSSR.
The entire territory of the Soviet Union, the People's Republic of China, the Democratic People's Republic of Korea, the Mongolian People's Republic, the United Socialist Republic of Indochina, and the Democratic Republic of Afghanistan, are all one big glorious nation. This fact must never become known to the capitalist west! It is in fact the most masterful and ingenious part of the godless communist strategy to subjugate the entire globe under the mighty, terrible heel of the Dictatorship of the Proletariat!