[ElTianti]

How would the Chinese deal with US Nuclear Subs?
All the Sunburns in the world won't sink a Sub. I
would think that Sub launched cruise missiles
would bea real problem for the Chinese navy

[Alpha One]

How would the Chinese deal with US Nuclear Subs?

Seems like they stole/(were given) classified technology that allows space based radar to look down into the sea in order to locate submarines.

U.S. Loses Hold on Submarine-Exposing Radar Technique

All the Sunburns in the world won't sink a Sub

Perhaps not, but a Chinese CY-1 ASW missle might.