Can you post a link to this, please? (I can find Fiio facebook page, but can't find X5 manufacturing pics)
...or do you mean these?:
It's not the X5, it's their process in general. I believe the photos are of the X3 but you can bet it has to be very similar. The link you showed up there is actually X5 batches but by the look of it those could be beta units. What I was referring to is how they described the way they QA, endurance and drop test the units usually a mark of a serious dedicated manufacturing business. Unless it's BS, all of the processes they described are in one way or another part of multi-billion electronics businesses, the likes of Sony and Apple. Kind a wonder how big Fiio is?