Russia is much more afraid of China than of the northwestern powers allied in NATO. And that is why she developed a military doctrine that points to an eventual attack by Beijing.
The leaked documents tell how the Russian high command has prepared several scenarios of possible Chinese invasions and how nuclear weapons could be used to prevent them. The papers also serve to see how Russia trained its troops to launch a nuclear first strike under ground war conditions. The war in Ukraine has put Russia in a military labyrinth in which it must put all its strength and expose its eastern flank.