Having already handled everything that needed handling, Yang Qing left Song Chuanli's place, leaving Ma Yuan behind, giving him a day to acquaint himself with the cleansing beetles and the abode.
Ideally, he would have liked him to remain at Song Chuanli's abode and soak up everything that he could for the two months he had, but with his other combat training to handle, and the weird almost symbiotic resonance he had developed with the spiritual plants and animals at Yang Qing's abode, where said plants and animals seemed to strengthen Ma Yuan's body using Yang Qing's residual qi and aura as conduit.
Ma Yuan needed to be strengthened holistically as much as possible and while Song Chuanli's abode was richer be it in terms of the quality of spiritual qi and the other components involved, it didn't have that healing resonant effect that Yang Qing's abode had.