The scholars in the Tang Dynasty commonly greed that at the beginning of constructing the town of Daxing Emperor of Wen in the Sui Dynasty associated the six loess ridges through the town to the SixYao Arrangement of the Heaven Trigrams. So he lined up the ridges in the order of 9, 92, 94, 95 and upper 9 and arranged varieties of buildings by meanings of the messages of divinatory symbols to indicate their functional division. An investigation of the current characteristics of this idea shows that in the early days of construction Yuwen Kai reasonably utilized the landscape of the town with reference to the SixYao terrain to present a wellmade patchwork view of the town, which embodied a cultural connotation in the urban arrangement and actualized the idea of agreement between heaven and man.

Heaven Trigrams; Six Yao; the town of Daxing； capital of the Sui Dynasty; the town of Chang’an； capital of the Tang Dynasty