So says David Axe, here:
The Song submarine’s surprise appearance alongside the USS Kitty Hawk helped stoke fears of Chinese undersea dominance that were further fuelled by a brief surge in PLAN sub acquisition. Today, with more US and allied submarines entering service and fewer Chinese boats on the slipways, those fears – and the policies and assumptions they produced – warrant reconsideration. China isn’t building a world-class, globally-deploying submarine force. It’s building a mostly defensive, regional undersea force – and a smaller one than once predicted.
The "incident" off the California coast almost a year ago does not warrant even a mention in this re-assessment of China's ability to project submarine power.