When you give little favour to others and they can repay it, it deepens the mutual friendship.
But when the debt is so great that they can't repay it even if they give everything they have, this creates immense pressure for the receiver of the favor.
Gratitude should be mutual, with both sides providing help to strengthen the relationship. But if one side is always giving and the other is constantly taking, unable to return the favor, the relationship is bound to deteriorate.
This becomes particularly distorted when it involves cultivators or increasingly powerful figures with deep vested interests.
Such is the case between the Great Ming Divine Dynasty and Pei Xuanjing. Pei Xuanjing's contributions to the Great Ming Divine Dynasty are so immense that even if the entire Dynasty were to be emptied, it might not be enough to repay his initial favor.
This is quite terrifying, especially for the emperor of the Great Ming Divine Dynasty, Zhu Houji.