Not immediately, no:

For the first part, the Russian gas pipeline infrastructure - crucial for deliveries - is still, to the majority of its capacity, directed towards Europe, not China. Pipelines have been built in Siberia and others may follow, but the capacity is not there just yet.

For the second part, I've read from some big cheese in an EU energy corporate (probably Total), that Europe doesn't have enough capacity at its LNG terminals at the different ports to switch overnight from pipeline delivered gas to tanker delivered LNG. Here too, it will take time. Energy infrastructures are slow moving.