C426 Isn't This the Tribe of Liang Prefecture?

Baili Ange nodded as if he understood something, then shook his head. She knew about the timing, it was around midnight when the yin qi was at its densest, and it was also when Gu Worm came out to eat and absorb the moon's yin qi.

However, it was just as Ashika said: these bugs are extremely small, and can't be found just by looking for them