Huangyuan County is under the administration of Xining and is located in western Xining in northeast Qinghai Province. Dan Gar Ancient City was built during the reign of the Ming dynasty Hongwu Emperor and was an important western Chinese economic hub and a militarily strategic city. Dan Gar is also an important religious site, named after the thangka, Tibetan Buddhist cloth paintings that hang in temples. Today's Dan Gar Ancient City is full of shops, it is prosperous and lively.
The famous Riyue Mountains is between Xiningi City and Qinghai Lake. There is a time-honored beautiful story: when Princess Wencheng of the Tang Dynasty entered Tibet, she broke her beloved stone mirror here. The stone mirror was divided into two parts, the sun and the moon, which later became this Riyue Mountains (Sun and Moon Mountains) Today, on both sides of the Riyue Mountains, there is a small mountain peak, and two landmark buildings, Ri Pavilion and Yue Pavilion, are built on them.
The Dange'er Ancient City is located in Wuyuan County, about 40 kilometers west of Xining City. It has been thriving in the history of tea and horses. Because of its unique location, it has the title of “sea Tibetan throat”. Today, there are many shops in the Dange'er Ancient City, which are prosperous and lively. Many tourists who go to Qinghai Lake from Xining will visit when they pass by. The ancient city is small in size, with a Dange'er Street as the center, and the houses on the street are all brick-and-grey buildings in the northern town.
Huangyuan Gorge is located in the middle section of the Qinghai–Tibet Highway. The Huangshui River runs from the northwest to the southeast diagonally through the northern part of Huangyuan County, while a tributary of the Yaoshui River runs from the south to the north, where the two rivers divide Huangyuan Gorge into a narrow valley basin in the shape of the character "ding" (丁), forming the "three gorges" of Xishi Gorge, Bayan Gorge and Yaoshui Gorge. Mountains line up on both sides of the Huangyuan Gorge. Characterized by dangerous terrain, it has been known as the "throat between Qinghai and Tibet" since the olden days.