《魏书·列传·卷二十三》
神瑞二年，秋粮歉收，太史令王亮、苏垣通过华阴公主等进言说依据谶书国家应当建都邺撼，享受康乐五十年，劝太宗迁都。
神瑞二年，秋谷不登，太史令王亮、苏垣因华阴公主等言谶书国家当治鄴，应大乐五十年，劝太宗迁都。
In the second year of Shen Rui, the autumn harvest was poor, and the historiographers Wang Liang and Su Yuan suggested that, according to the prophecy, the capital should be moved to Ye, which would bring fifty years of prosperity, and they advised Emperor Taizong to move the capital.