you can not understand nor you will understand, if you were good in Geopolitics and history you could see a glance, if you were a bit honest you could see but you will not since you are like the 1930s Japanese who shouted banzai and did not see the doom that was at dawn.
But I will give a hint, China will be enticed to betray Russia and India, riches will be promised by the west specially Europe, but when China moves Russia will be hurt and so India, they will switch sides, and the Mongol Khan will be surprised.
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Study WWII and WWI how Italy betrayed Germany, how the Soviets from allies of Germany became enemies, history repeats because great empires make alliances to betray later and the winner take the spoils.
Give you a Clue as long as China takes Siberia Europe will never complain, but when the Mongols want beyond the Urals they will join Russia and so when the Mongols cross the Euphrates the west will pull back the yellow sea.