Comment by CSMastermind

This is only partially true.

China's primary concern is resource extraction from Venezuela, which is why Trump immediately clarified that they'd make sure China still got their oil deliveries.

Russia is stretched way too thin right now to do anything meaningful about it.

Venezuela was basically being run by Cuba. Maduro was really only a figurehead. The military and government was functionally run by imported Cubans which is why a coup wasn't possible.