 Guanzhong dialect is divided into Xifu dialect (Baoji, western Xianyang) and Dongfu dialect (Xi'an, Xianyang, Weinan, Tongchuan), which is the oldest language in China.During the Western Zhou Dynasty, the Guanzhong dialect was called "Yayan".The Book of Poetry records that "the Shang King was not elegant, but the elegant were free from Zhou."