Gathering so many injured individuals with uncertain danger levels at once poses a significant challenge to Chen Fei's refuge; if those unstable individuals start fighting again, causing grave casualties among innocents, it would all be Chen Xiao'er's fault.
Let the AI "Adam" skim over the list of detained personnel, conscripting all the Neanderthals.
Chen Fei at least holds the title of honorary clan leader, even with a reputation for ferocity, even though he is not actually a Neanderthal, but such minor details need not be minded, as no Neanderthal would dare to disobey him.
If anyone could rampage unchecked across the Neanderthal reserve, even the once-imposing remnants of the Third Era Civilization would submissively give in — fine, if you can't beat them, join them, you're the clan leader, lie back and please yourself!