It's completely plausible, which is the most convincing kind of unverifiable stories.

It also caters to the usual biases of the HN crowd: China, nuclear projects, secrecy, etc.

How come the Chinese post is from 2016 and complete but now we're getting it in English and in parts?

Of course, none of it means this is fake. It's just, like the parent commenter said, "slightly off".