I hope this reckless and aggressive action by China puts an end to any further contact between NASA and the Chinese. China should be shunned like the international space faring pariah that they are in the world.
For reference, the satellite that China exploded into hundreds of dangerous pieces was orbiting Earth at an altitude of 542 miles. There are currently more than 280 satellites orbiting Earth below an altitude of 542 miles, including the Hubble Space Telescope at an altitude of 352 miles.
So, as atmospheric resistance slows down this space junk, everything below 542 miles altitude will be joined some time by this debris. If all of it is rotating in the same direction and speed, not much to worry about. However, if a meteorite came in and deflected some of the debris, you would have a nuisance. Also, we have no way to know where all of that destroyed satellite went. The Hubble Space Telescope has some suspicious problems. And, we will have little information about the more top secret satellites which are also in low orbit.