The US conceives the millions of parts in its subs and has developed these ships and built them and operated them for millions of hours over the past hundred years.
China has virtually no experience by comparison. I pity the poor bastards that have to go to sea in one of these.
The Bent One Klintoon gave them the plans to all our hard work last century.
Even a knock off Ohio-class sub could be.....troubling.
Remember the Chinese sub in 2003 that was found on the surface with its entire crew dead. https://en.wikipedia.org/wiki/Chinese_submarine_361