But wouldn't such scorched-earth policy turn other space users like Russia and EU against China?China could also go full scorched-earth and make space full of debris to knock out all space assets from all countries
Instead of having an explosive warhead, it could have 10000 small steel balls (shotgun style) and explode them into the upper space.
Make it x1000s missiles with calculations of where to ideally explode each missile for best coverage and you got the recipe of completely destroying everything that is in orbit
After all, China already has communication drones which can act as sensor nodes so it can partially fill the sat roles
To summarise, I see this move as completely destroying US capabilities while greatly harming China. Net positive to China (war is going to be closer to its shores, more options to replace satellite roles by airborne means)
Side effects include stopping human's civilization advancement into space for dozens of years, but this should be an acceptable price to win such a war against a belligerent US