In the end, Yun You still accepted Jing's invitation and became his student.
Although the little girl had great prejudice against Apprentice Death Gods and generally harbored hatred towards all of them, to be honest... she didn't really dislike Old Jin as a person.
Although Jing had both strength and status far above her, he did not act condescending, but instead treated Yun You with an equal status.
He gave Yun You enough respect, and this respect for the weak is precisely what the group of Apprentice Death Gods finds hardest to possess.
Yun You felt that he might really be different from those other Apprentice Death Gods who were used to treating lives as insignificant.
Secondly...
Although Jing did not directly threaten her, judging by his "kind" tone, he probably left Yun You no option to refuse.
Although Yun You was as stubborn as a rock, she was not unyielding and understood how to adapt.
She knew it was not the time to be stubborn.
