While Liu Zhiyuan was on the campaign against Du, his oldest son Liu Chengxun (), who was said to be kind, faithful, gentle, and capable, died. It was said that the people were saddened by Liu Chengxun's passing.
Liu Zhiyuan's campaign against Du coincided with the death of his oldest son, Liu Chengxun, a well-respected individual known for his kindness, loyalty, gentleness, and competence. The passing of Liu Chengxun deeply saddened the populace.