.I'm really surprised about this. Given Chinas notorious for shoddy engineering standards, and consumer goods electronics ect.
Not to mention the security risk it might pose, they have Arliegh Burkes using those docks too, woudnt that pose a security risk, given their habit of backwards engineering any valuable specifications, military or otherwise, they get their hands on?
China has recently landed a spacecraft on the far side of the moon, they have evolving defence equipment which is competitive, they have the largest and one of the best fast rail networks in the world just to name a few of their technological accomplishments.
“Shoddy” engineering does not deliver these.
I can remember when the first Japanese cars appeared on our roads in Oz, universally condemned as “Jap crap” but they were still going strong when most of the locally built cars were rusted away.
Never ever underestimate the capability or quality of a prospective opponent, that will cause immense pain.
Getting back to Chinese achievements in engineering, just one visit to Shanghai will change your mind so I don’t think a piece of “primitive” construction such as a dry dock will cause any concern and what security concern could there possibly be for something that’s nothing but a steel box with a few pumps?