Datong has been known as "Phoenix City" since ancient times. It was the first capital of Tuoba family in the Northern Wei Dynasty in the Central Plains and the capital of Liao and Jin Dynasties. It is a world-famous tourist attraction, which combines the charm of Wei and Jin Dynasties in one mountain and the romance of Liao and Jin Dynasties in one city. Datong has Nanguan, Beiguan and Dongguan, but there is no Xiguan. People say that Nanguan symbolizes the head of the Phoenix, Dongguan is the left wing, and Beiguan is the longest, symbolizing the tail of the Phoenix. It is said that a phoenix landed near the archway in the same city in ancient times. After the phoenix fell, a brave soldier saw that it looked different from any bird, with gorgeous feathers, colorful and arrogant posture. Driven by curiosity, the samurai drew his bow and shot an arrow at the phoenix, just hitting the right wing of the phoenix. The phoenix let out a piercing long sound in pain, shook off a feather, flew south and disappeared into the sky. The feathers that the phoenix shook off fell leisurely, and they were all asked in an instant and scattered all over the floor. Then, these feathers became Datong city. There is also a legend about the origin of Phoenix. That was when the emperor dreamed of the dream entrusted to him by Zhang and instructed them to build this big city into the shape of a phoenix spreading its wings. The Ming dynasty thought it was providence. So, in the fifth year of Hongwu (1372), General Xu Da built a big city in the former site of "Tucheng in the Cloud" in Liao and Jin Dynasties. During Jingtai period (1450- 1457), the governor was rich in suggestion and built a "northern town" in the north of the city. During the Tianshun period (1457- 1465), Han Yong, the governor of Imperial Capital, was ordered to build "East Town" in the east and "South Town" in the south. After the vicissitudes of past dynasties, most of these exquisite buildings with carved beams and painted buildings on the top of Danjuwa were destroyed by fires in past dynasties, and some were demolished due to urban expansion. Today, the landscape of mountains and rivers and historical sites still exist, and passers-by can only lament. Fortunately, there is only one Gu Lou left in the city. Visitors can visit it, see its features, remember the past and imagine the bustling scene of that year.