It will be useful for defending against them, but their tech isn't as good as ours. It's not like we are going to learn any advanced technology. That ended in the 70s. By the 80s the Soviets were already behind us in every area technology speaking. It's only gotten worse since then. They are a corrupt dictatorship with little to no cutting edge innovation.
If I were a Russian civilian, I'd be disgusted at how much progress China has made since the 80s. Compared to Russia, it's night and day. China has a dictator too. He's just way more sophisticated and intelligent than Putin. He doesn't have to be a brutal azzhole, like Putin. He's done so well for China and the Chinese people. Brought so much prosperity. They probably love him. Russia is like a filthy decaying trailer park in comparison.
Once Putin is gone, they will replace him with someone just like him too. It's a guarantee.
China is blowing past us now.