Grandpa Gave Me His Life in Exchange for Eighteen Years, and I Rebelled Against the Yins.

Before his death, grandpa said: Our Chen family will collect debts on behalf of the underworld. I thought he was crazy. Until I see the impermanence of black and white One black and one white, the chains clattered. The candlelight in the room turned a miserable green. That book is called the Yin Debt Book. I became a debtor.