Also, I guess you can’t explain why Finland isn’t Russia’s best friend despite bordering Russia.
If you can explain why your argument doesn’t apply to Finland, I’ll point you to a news report showing China’s support for Russia.
"Finlandization is the process by which one powerful country makes a smaller neighboring country refrain from opposing the former's foreign policy rules, while allowing it to keep its nominal independence and its own political system. [...] The Finnish political cartoonist Kari Suomalainen once explained Finlandization as "the art of bowing to the East without mooning the West"." [0]
The Soviet Union's collapse allowed Finland to spread its wings a bit more broadly, but it's worth pointing out that yes, Finland was cozying up to the Soviet Union like mad, in order to best survive their physical proximity. The logic does seem to check out, at least while the bogeyman of the USSR still shambled around.
If one of your neighbors was beating up and stealing from another of your neighbors, are your really saying you’d cosy up to them?
I am critical of the Chinese system of government, but I’d never think of them as cowards.