Question for you Mark.....why do you think that the Chinese think building a submarine capability is important?
IN HOC SIGNO,
To answer your question on Chinese subs:
The PLAN/Chinese Navy needs submarines partially to blockade Taiwan and as a way to assert their claim over the Yellow Sea, East China Sea and South China Sea without the luxury of large carrier battle groups. Their having so many
Ming, Song and
Romeo Class SSKs left over from the Cold War, as well as newer types like the
Han, Yuan and
Kilo Class subs, means that their naval doctrine might have been based on the Soviet Navy as well before the Moscow-Bejing schism that was in full swing by the end of the 1960s. So far the
Han class is the only Hunter-Killer (like Fast-Attack SSBNs of the USN) SSN the PLAN has, though it is noisy and anything but fast.
Furthermore, the Chinese also maintain a marginal SSBN capability with their
Xia Class sub- and that newer
Jin Class SSBN spotted on Google Earth- to supplement the missile brigades of the PLA Second Artillery whose mission is to give the CCP leaders the option to strike back. The "No Strike First" nuclear missile policy advocated by Mao still remains the doctrine of the PLA Second Artillery's units; you will see that policy stated in any Sinologist's books about the PLA which even mention China's strategic missile forces, such as those by David Shambaugh.
BTW, the article link you provided misspelled the Chinese sub class name, featured in the article, as the "Yaun" when they mean "Yuan". That name is the Mandarin name for rule of that dynasty of Mongol rulers who occupied China for about a 100 years; Kublai Kahn, one of the Yuan Emperors, was supposedly the grandson of Genghis Kahn. Some analysts have speculated that the
Yuan may have been based in part on the
Kilo Class SSKs the PLAN already has a few of.
Here's a
Jin Class SSBN overhead picture, btw, as well as the link to the article describing it:
http://blogs.abcnews.com/scienceandsociety/2007/07/the-jin-class-s.html