There were many cities on the Silk Road. Because of the age, coupled with the desert sand erosion and the threat of war, many ancient cities have disappeared. The ancient city with good luck still has a ruin, and the city of Lockyang is one. Lockyangcheng, formerly known as Bitter City, is located on the Gobi Desert, about 70 kilometers southeast of Guazhou County, Gansu Province. It is also one of the well-preserved Hantang ancient cities in China. It was first built in the Han Dynasty and about 1 in the east of the city of Lockyang. There is a piece of Tutalin at the kilometer, which is called the Ta'er Temple by the locals. This is the site of the Great White Pagoda in the Ta'er Monastery. In the Tang Dynasty, the gelatin Kaiyuan Temple was recorded. According to the "Da Tang Western Regions", Tang Xuanzang once said that it is more than half a month. According to historical records, the Ta'er Temple is a place where the local officials of the Guazhou and the Song and Yuan Dynasties and the people performed religious sacrifices during the Tang and Five Dynasties. It can be seen that during the Han and Tang Dynasties, it was very lively. From the aerial view of the ancient city, you can see that the main city is rectangular, 470 meters long from north to south and 430 meters wide from east to west. In addition to the main city, there are 4 Yucheng. There is no existing house, only one tower with a height of more than 1 meter, lining the adobe and five small towers. Historically, the city of Lockyang is a large ancient city on the throat of the Silk Road. It plays an important role in politics, economy, culture and military, and preserves the best ancient military defense system and ancient farmland irrigation system. At the same time, it is also a typical specimen of the vicissitudes of the ancient desertification evolution process. It is the most perfect tourist attraction combining the ancient cultural relics and unique natural landscapes in western China. If you want to experience this history, you can come here and take a turn.