That isn't nearly a tenth of the value that China gets from US trade.
The Chinese are looking at the next step, how to grow their economy based mostly on domestic driven demand. I.e. if China gets this going, trade with the US won't be a clincher. The thing about Russia is its closeness, the lack of people in the east, and the resources there.
It's a bit of a open question how far Chinese companies have actually shouldered into Russia's eastern regions already? Formally and officially it is all very well in hand by the government in Moscow. But, well, massive illegal logging and all manner of other shenanigans that are not part of the official narrative coming out of Moscow also seem a reality.
It has been broached from Chinese sources (think tanks etc., not official policy as such, yet) that China might like to reverse some of the 19th c. treaties that created the current border configurations. (Hey, if Russia can do it in Ukraine, why not China in the Russia Far East?) This can be done with more, some, or hypothetically no Russian compliance eventually, depending on how the chips fall.
Trumps fascination with Russia seems to be his fascination with strongmen, seen to be squarely in charge of their countries, and no pesky checks, balances or public and civil society allowed to but it. That is apparently why he despises western liberal democracies, which he personalizes as despising their elected leaders. It by now seems unlikely Trump actually understands what strength looks like. He is distracted by surface impressions.