I agree that they are not on par with our arsenal or defense system but I think you are overestimating the capability of our nuclear defense. The iron dome (provided by us) is widely regarded as one of the best if not THE best missile defense system. According to analysts it has around a 90% success rate in missile interception. Extrapolating that rate to a full Chinese assault means that around 540 (90%) of nukes would be stopped and approximately 60 (10%) nukes would hit. This would be a devastating attack and while all of china would probably turned into dust finer than the surface of the moon, It wouldn't be a ideal result for us.
I agree that they are not on par with our arsenal or defense system but I think you are overestimating the capability of our nuclear defense. The iron dome (provided by us) is widely regarded as one of the best if not THE best missile defense system. According to analysts it has around a 90% success rate in missile interception. Extrapolating that rate to a full Chinese assault means that around 540 (90%) of nukes would be stopped and approximately 60 (10%) nukes would hit. This would be a devastating attack and while all of china would probably turned into dust finer than the surface of the moon, It wouldn't be a ideal result for us.