It's okay if Authors want Chinese to be the only powerful race or surviving race, buts it's definitely not okay when he associates black people to filth.
The story overall was quite good, but the translation was not pretty bad. It was very MTL with minimum edited so a lot of sentences have wrong meaning and some chapter was pretty confusing. But the worst part was the side story just end half way without finished. So if you want to read. I recommend just read the main story.
Points 1,3, and 4 make sense, but is it really an issue that the system isn't explained? I'm kind of tired of authors trying to explain the systems rather than leaving them as the inciting incident and proceeding with the story.
This was the most they could do as Ivan was still looking for experienced doctors and biologists from the Federation, but he had recently formed a list of potential candidates so hopefully they would soon be bought over.