Sanctions have consequences.
Russia and China are being pushed closer together. Russia has two things the Chinese need, desperately. Fuel and land (most of the land along the border is unoccupied). China has a massive industrial machine, that puts the rest of the world to shame. They have similar ideologies.
Thus far, the only thing that has really kept them apart is the profound xenophobia of both populations. Hit Russia hard with sanctions though, and the powers that be will have to look to creating closer ties.