Song Rongxuan disliked his childhood companion very much, that person was called Gu Ziyuan. When he was young, he just hated him for hiding his inferiority even though he was obviously outstanding in everything. This made Song Rongxuan feel that he had been greatly insulted. When he grew up, he abducted his sister, which made his hatred even worse.
Purpose: A battle of wits with the prince in two or three matters