just an fyi if all this seems weird:
Here is the thing, and this goes for everyone on this sub.
Hara
only follows one historical record as a source: the Shiji by Sima Qian.
And in the Shiji, the descriptions of the events on this year 233 B.C. are particularly limited, they
do not mention anything about numbers or tactis employed by either the Zhao or Qin armies in this engagement.
It only mentions Huan Yi (Kanki) taking Yi'an, killing a Zhao General, then being repelled by Riboku (Li Mu) at Feixia, and Riboku (Li Mu) becoming the Lord of Wu'an after the battle.
If you are going by the wikipedia description on the Battle of Fei, I'm sorry to break all your hearts but none of that is in the Shiji, that's the reason why Hara isn't sticking to that.
Something similar happens with the whole Kanki/Hanoki thing fleeing to Yan, that's a theory from another historian, Sima Qian
never wrote about that, Shiji doesn't mention Huan Yi (Kanki) ever again after the engagement in Feixia, so Hara has open room to fill the fate of Kanki; that being said, since Hara only follows the Shiji not other scholars, I highly doubt that he's gonna go with the theories of other people that are not Sima Qian.
this is from reddit a couple months ago.
https://www.reddit.com/r/Kingdom/comments/w2wdyk