I have no reason to believe those photos/images/renders...whatever...are legit.
We rarely post anything by NPU because they're all over the map on their leaks, etc. Lots of their 'exclusives' tend to be obvious things.
Considering no images have ever leaked of SP4, Book, or Studio before its release I find it hard to believe someone in China would have access to this device or what it looks like.
There's a reason why Microsoft hardware prints/makes prototypes in their own building and not China. We've all seen the tours. They can print hardware prototypes for any device including full computers frames.