《北史·列传·卷六十七》
雁门之围解除后，回至太原，人们多劝炀帝回京师，炀帝面有难色。
及围解，次太原，议者多劝帝还京师，帝有难色。
After the siege of Yanmen was lifted, he returned to Taiyuan, where many people urged Emperor Yang to return to the capital, and Emperor Yang showed difficulty on his face.