Any high priority shipments can be trucked or flown in, so even if Russia’s 1000+ mile border with China only has a single rail link (dubious), the impact is only on low priority bulk shipments. Goodness, what will China do without Russian lumber or Russia without Chinese consumer electronics? This is another example of Ukraine wasting resources on irrelevant headline-grabber efforts rather than relevant battlefield attrition.
Who benefits from preventing Russia moving forces to the Chinese border? It isn’t Ukraine.
If China decides to retake the land it still claims in the Far East, the opening of that attack will look a lot like this explosion.
“Any high priority shipments can be trucked or flown in”
Trucking in Russia is not the same as it is in the USA. Most heavy cargoes travel by rail because the Soviet-era government emphasized rail over roads. The Trans-Siberian road was finally and completely paved in 2021 but its current state is unknown.
In any case, it is not designed for long-haul trucking like we see in the USA.