《宋史·列传·卷七十五》
等您有亲子后再改立，而给曾立为太子的人以一定地位，谁说不合理呢？
俟有皇子则退之，而优其礼于宗室，谁曰不然？
After you have a biological son, you can change the Crown Prince designation, and grant a certain status to the person who was once appointed as the Crown Prince. Who could say that this is unreasonable?