Good thing they are developing all that tech themselves, and not stealing it.
3 US companies sanctioned over blueprints sent to China
“The companies — Quicksilver Manufacturing Inc., Rapid Cut LLC, and U.S. Prototype Inc. — provide 3-D printing services to customers that include manufacturers of space and defense technology. The Commerce Department says the customers would send blueprints and drawings to the companies that they wanted printed — and that the companies in turn would send that work to China, presumably as a way to cut costs.”
https://apnews.com/article/technology-china-government-and-politics-business-05e85210c373b184074dd82f0e567361

I also remember the accusations of the Clinton admin allowing the transfer of Nuke and rocket tech to China in the 90s, by granting export licenses that resulted in major Chinese advances.

Its back to the 1970’s for Russia.

During the launch coverage of Shenzhou-14, the announcer proudly said that all the parts for the spacecraft and the modules of the Tiangong-3 were built in China. China has bought all technology they could from Russia. I would say that China has emulated Russia’s space program and has exceeded it. Now they want to emulate the West, specifically SpaceX in reusablility.

China wants money and will not pay Russia for their services. Russia is the same. If they do decide to work jointly, I am not sure China would accept the quality control issues like the cracks in the modules, drilled holes in the Soyuz, the problems with the Proton rocket, and the firing of the thrusters from Nauka almost a year ago.

Without ISS, there are no more Soyuz flights. If Russia wants to put up their own station (ROSS), I think all they have left is a backup spare of Zarya, the power platform, a science (forgot the name) module, and some other modules that are used as simulators on the ground. I don’t see them putting up ROSS since they never came through on the Kliper and Orel spacecraft replacement of the Soyuz.