Try not be blinded by political scheming, China is not trying to conquer the world and US is also not trying to bring peace, the game is not as black and white as you would believe and the "good guys" will be shown as less good in 50 years when the secrets will be reveled and propaganda will switch to something else.

Not cooperating in space related topics is as stupid as US demanding not to use mathematics or physics developed by China. Science should not care about the politics of the current dudes in power.