Dunhuang is located at the intersection of Gansu, Qinghai and Xinjiang provinces (regions).

The city's economy is mainly based on agriculture, followed by the tourism service industry, and there is no relatively strong industry.

This is negligible among counties and cities across the country.

However, Dunhuang is famous all over the world because of its former glory and profound cultural connotation.

The Mogao Grottoes were listed among the first batch of national key cultural relics protection units by the State Council in 1961. They were included in the World Cultural Heritage Protection Project by UNESCO in 1987 and were awarded the "World Cultural Heritage" certificate in 1991.

Dunhuang is surrounded by the majestic Qilian Mountains to the south, the vast Taklimakan Desert to the west, the rugged Besai Mountains to the north, and the Sanwei Mountains with abrupt peaks and rocks to the east.

It has a warm temperate climate.

The annual rainfall is only 39.9 mm, while the evaporation is as high as 2400 mm.

There is ample sunshine and a long frost-free period.

In this small natural basin embraced by mountains, the snowy water of the Danghe River nourishes the fertile fields and fertile soil, and the shade of green trees blocks the black wind and yellow sand; the harvest of grain and cotton is guaranteed despite droughts and floods, and the melons and fruits are fragrant all year round; the wonders of the desert are mysterious and unpredictable, and the Gobi Fantasy Sea

The world-famous cultural relics and numerous talented people... Beautiful Dunhuang is a rich, magical and attractive land.

Located in Nanhu Township, 70 kilometers southwest of Dunhuang City, it was one of the two passes that opened up Hexi Province for Emperor Wu of the Han Dynasty. It was one of the two passes of "four counties and two passes". Since ancient times, it has been a must-pass pass for the Silk Road from Dunhuang in the west to the southern route of the Western Regions.

, the gateway to the western border.

Wang Wei, a poet of the Tang Dynasty, wrote, "The city of Weicheng is light and dusty in the morning rain, and the guesthouses are green and the willows are new. I urge you to have a glass of wine, and there will be no old friends when you leave Yangguan in the west." This made Yangguan famous throughout the ages.

Yangguan was built around the fourth year of Yuanfeng in the Han Dynasty (107 BC). It once had a captain to manage military affairs. From the Han Dynasty to the Tang Dynasty, it has always been a must-pass pass on the southern Silk Road.

Due to the long history, few beacons remain in Guancheng. According to the records of Yuanhe County, Yangguan is located six miles west of the county (Shouchang County).

It lives in the south of Yumen Pass, so it is called Yangguan.

It was originally built in the Han Dynasty, on the south road of Wei, and in the west of Shanshan and Yarkand.

Later Wei tried to establish Yangguan County here, but Zhou Dynasty abolished it.

"The Dunhuang Stone Chamber Manuscript (Shazhou Geography) (P. 5034) collected in Paris contains: Yangguan, twenty steps east to west and twenty seven steps north and south. On the right is ten miles west of (Shuchang) County. It is now destroyed and the foundation site is

It is connected to the south of Shicheng and Yutian, so it is named "Yangguan" (note: the ancients regarded the south of the mountain as the north of the river). It can be seen that Yangguan was destroyed in the Tang Dynasty, and only the ancient Shouchang City remained.

Near Beigong Village, Nanhu Township, Dunhuang City today, Yangguan was located 6 miles or 10 miles west of the old city of Shouchang. According to experts' research, the original site of Yangguan was located at the Antique Beach in the west of today's Nanhu Township.

"The quicksand zone.

Traveling 75 kilometers southwest of Dunhuang City, you can reach the former site of Yangguan: "Antique Beach".

When Mr. Xiang Da visited here in 1943, he wrote: "There is a place named Antique Beach in the northwest corner of Nanhu Lake today, which is blocked by quicksand. The remains of block building and pottery fragments are everywhere, and ancient artifacts such as jade, pottery fragments, and ancient coins are found everywhere.

It belongs to the period from the Han Dynasty to the Tang and Song Dynasties. The ruins of the ancient beach meander to the north of Longshou Mountain in the north of the South Lake and end at the foot of the popular name Hongshan Pass. It can be three or four miles from north to south, and is covered by quicksands in the east and west. It is so vast that it is difficult to examine."

In 1972, the Jiuquan area cultural relics survey team discovered a large number of wall foundation ruins behind the 14th sand channel on the west side of Antique Road. After trial excavation and measurement, the houses were arranged neatly and clearly, covering an area of ??tens of thousands of square meters. There was a continuous and generous castle wall foundation nearby.

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The former site of Yangguan should be located here.

In ancient times, there was a 70-kilometer Great Wall connecting Yangguan to Yumenguan in the north. There were beacon towers every dozens of miles, and there were more than a dozen beacons near Yangguan.

In particular, the beacon called "Yangguan Ermu" on the top of Dundun Mountain on the north side of Guantan is the largest, has the highest terrain, and is relatively well preserved.

Why was the Yangguan Ancient Fortress built in this desert?

Archaeologists have found that Yangguan occupies a dangerous terrain where "one man can guard the pass, but ten thousand people cannot open it".

The nearby water source was abundant in ancient times. Wowachi and Xitugou were the largest independent water sources. At least three to four thousand years ago, this area had become an oasis basin and had a developed Huoshaogou culture. During the Han and Tang Dynasties, Yangguan sergeants took advantage of it.

This water lives and breathes.

Xitugou is usually dry in the upper reaches, but springs in the lower reaches form a stream flowing northward. Flash floods occur from time to time.

After the flood peak, the ditch banks collapsed one after another, the river bed widened, and a large amount of sediment flowed down the river and was deposited downstream.

The sand was blown and carried by the northwest wind, forming strips of sand ridges, and the ancient city of Yangguan was gradually destroyed by water and buried by sand.

Tourists who visit the Silk Road must visit Dunhuang, and tourists who visit Dunhuang must visit Yangguan.

There are not many beautiful monuments. The key is to pay homage to history and continue the lamentation of history in the space of imagination.

There is a Nanhu Lake and Grape Corridor near Yangguan, which are unique in style and you can visit the local folk customs.

Dunhuang Sanwei Mountain Tourist Area is located 25 kilometers southeast of Dunhuang City. It is closely related to Mogao Grottoes and Buddha, and complements each other, forming a tourist landscape featuring Buddhist culture on the Silk Road.

Sanwei Mountain stretches for dozens of miles from east to west, with its main peak facing Mingsha Mountain across the Daquan River. Its "three peaks stand tall, as if in danger and are about to fall, so it is said that there are three dangers."