Ask questions first and then why? First of all, when did you ask? Now there is no such country as the Soviet Union. When it comes to Russia, I dare say that Russia can't beat China. If you're asking about the past, there was no direct large-scale war between China and the Soviet Union, and the outcome is unknown, but there was still a small conflict like Treasure Island, when China won. Vietnam's self-defense counterattack also had the support of the Soviet Union, and China won in the end, but neither of these things can show that China can defeat the Soviet Union in direct conflict. If we put two countries on the scale regardless of all international factors, we can admit that we can't beat them. Why is it so simple, and the national strength gap is too big?