I would always refer to Hanlon's razor on things like this: Never attribute to malice that which is adequately explained by stupidity. I'm not trying to finding excuses for them, just saying that most likely there's no deep conspiracy theory involving government level surveillance here, they are just stupid. On average, Chinese software engineers are less educated and have no sense about privacy or how to implement privacy related features properly.

While logging serial number and some of the basic analytics stats might be attributed to stupidity, I tend to think that using a pretty advanced set of system commands and logging output consistently to log files is very sketchy.

Privacy is a totally different concept in China, this becomes very clear once you visit a public toilet in Beijing’s Hutongs.