Although He Chao fully complied with Li Yu's directives, his daughter was also within the base.
He Chao had no reason, nor any motive to do anything out of turn.
But as Li Yu was the controller of the base, he had to establish the authority and credibility of a leader.
Simply put, those following He Chao shouldn't listen to him completely over Li Yu.
He also needed to win over hearts and minds and be able to instate some restrictions on He Chao.
After all, power is but a plush bed of corruption; he must impose certain restrictions on He Chao.
This was a necessary action, not out of distrust for He Chao, but because doing so was better for everyone.
Li Yu went around and communicated with them all.
Judging by their responses and verbal replies, Li Yu was quite satisfied.
It seemed that every time Li Yu rewarded them, and increased their monthly rations, He Chao hadn't taken any of the credit for himself.
Instead, he had reinforced Li Yu's position.