As to China, and everybody else that could join in, what are the individual persons doing for their own survival. A couple hundred nuke detonations of 100 kton each across the country would not kill everybody right away, fallout being not much of a threat to the prepared, but the economy would be out of order for years, maybe decades, maybe 200 years. It is survivable, but only if everyone who is interested in active preparation starts preparing in reality. The Internet can get the word out, but the Internet won't pick up a shovel.
Got preps? (I do....)