Introduction to the IOU for the burial of Qu's mother: Qu Qiubai's life was very difficult when he was a child. After moving into the ancestral hall, Qu's mother committed suicide because she was unable to repay her debts and was heartbroken for her child's future. After his mother passed away, the poor Qu family could only borrow money to bury her. This is the IOU written by Qu's father.