Bai di has been living in the area for a long time, but he hasn't yet formed a relationship with a cultivator. He's not the representative of spirits, he's just a young man from the dragon clan. Bai di is getting used to the area, and he doesn't want to be biased against the cultivators. He says that he'll accept the offer humbly. He also asks if he has any intention of making a contract with Bai di, and Bai di says yes, because he has a special bond with the spirit, and that's why he made the contract with him. If he made another contract, he wouldn't be able to maintain that bond, and so he'd have to leave the area to someone else. He tells Bai di that he wrote this episode to emphasize that Bai di and the master aren't a couple, but that if he still likes them, he won't change his mind