In the first year of the Emperor of the Sui Dynasty (581) to the four years of the great cause (608)，Emperor Sui Wen and Emperor Sui Yang seven times to regulate millions of labor，Constructing East to Zihe、Zhongjing Shuo Fang、Great Wall Defense Line from West to Yugu，History called "Sui Great Wall"。Yugu, as the western end of the Great Wall built in the four years of great cause，It has important geographical coordinate significance。About the location of Yugu，Du You proposed the saying of Wuquan County, Lanzhou, Tang Dynasty，Hu San Province believes that in the West of Yulin County, Sui Dynasty，Gu Zuyu advocates that it is located in Xiningwei in the Ming Dynasty。Yugu's statement in Wuquan County, Lanzhou is wrong，confuses the relationship between Yuzhong County and Yugu in the Tang Dynasty。Today's scholar Zhao Jie is based on the Han Dynasty's "Lidy Lumaga" and the Ming Great Wall Rites in the East of Qinghai，Met the point of Yugu in Guide County, Qinghai Province (Zhao Jie: "The Great Wall of Sui Da Yeye in the Four Years of Yugu"，Wan Ming、Editor -in -chief of Du Changshun: "The Silk Road and Northwest Nationals under the History of Sino -foreign relations"，China Social Science Press 2018 edition，pp. 108-117)。Li Hongbin believes that Emperor Sui Yang built the Great Wall on the front line of Heba to defend the Western Turks，Draw the location of "Yugu" in the northern Bet365 app download part of Hetao (Li Hongbin: "The Northern Defense and Great Wall of the Sui Dynasty"，"Research on Chinese Frontier History and Land" 2006, No. 4)。Ai Chong's clues "Sui Great Wall outside the county" based on the "Lingzhou Huaiyuan County" article，It is believed that Yu Valley is in the valley of the wolf Shanxi Duan in the northwest of Langkou County, Langkou County, Inner Mongolia (Ai Chong: "The Realm of the Great Wall of the Sui Dynasty"，Xi'an Map Press, 2006 edition，p. 85)。

Judging from the relationship between Sui and Turks during the Emperor's Emperor to Great Career，Three years of Emperor Sui Emperor、The Great Wall was built in the northern part of the north during the four years of the four years of the big cause，Its main purpose is to prevent the invasion of Western Turkic and Tiele to the East Turkistan Qimin Khan。The Great Wall of Four years of the Great House should be located in the northern part of Hetao，instead of located in the Yellow River upstream of the hinterland of Tuguhun。Therefore，Yu Valley is located in the inference of Moto Valley, Wolf Shanxi, northwest of Langkou, Langkou County, Inner Mongolia Autonomous Region，Follow historical facts。Start with the political background of the Great Wall from the beginning of the great cause，Comprehensive border between Huaiyuan County, Lingzhou, Tang Dynasty、Reasons for the name、Place name Chinese -Mongolian conversion、Geographical features and other factors，The author believes that Yugu is located in Haira Sun Hu Hot。

After Emperor Sui Yang ascended，East Turkistan Qimin Khan, which has been supported and protected Bet365 app download for a long time, actively shows。Therefore，Preventing Western Turkic and Tiele's invasion of Khan Khan，Become the top priority of the Sui Dynasty stabilized northern frontiers。Emperor Sui Yang recruited the civil force to build the Great Wall in the north of Heba，Not only consolidated border defense，And maintaining the stability of the river set。Tiele, who has long threatened the northern frontiers in the northern frontier in the three years, "sent the envoys，Self -continuous cloud "，It may be declined with the Lo Kehan ​​forces at the Western Turkistan、Emperor Sui Yang built the Great Wall related。

April three years of great cause，Emperor Sui Emperor Patio Yulin County in the north。Two Month，In the county city (the ancient city of Xijiu Village, the 12th urban and rural villages of the Inner Mongolia Autonomous Region), a grand welcome ceremony was held for Qimin Kehan。Kill He Ruoyi、Yuwen、Gao Yan and other ministers who opposed the construction of the Great Wall，Emperor Sui Yang "Fa Ding Men's Million Great Wall，West distance Yulin，East to Zihe，Twenty -twentieth，The deceased 156 "。This Great Wall from the west of the Inner Mongolia Autonomous Region Wulatian Qianqi Wuliang Suhai Northeast，Fall a thousand miles to the east，Arrive in the southeast of Jining District, Ulanchabu City, Inner Mongolia Autonomous Region、The upper reaches of the Toyo River，Cross Yulin County、Dingxiang County and Miyi County north，It is the preparation of the Great Wall, the Great Wall, which was rebuilt 20 years ago,。bet365 live casino games March four years of great cause，Emperor Sui Emperor's North Patrol Wuyuan County (south of Wuyuan County, Inner Mongolia Autonomous Region)。Two Month，Xiazhang built a house for Qimin Khan in Wanshouyu。Three years of great cause of the Emperor Sui Yang in the north of Yulin County，I met Khan Khan in Yulin Palace。Four years of great careers to show the city near Yulin Palace to build a city for Qimin Kehan，When it is reasonable。July of the same year，Emperor Sui Yang in order to create a frontier situation that is conducive to Qimin Khan's stable development，Extension to the west on the basis of the Great Wall built in the three years of great cause，"Faying Ding Nan more than 200,000 to build the Great Wall，East East from Yu Valley "。

"Yu Valley" in "Sui Shu" in "Under the Northern History · Sui Benji" is recorded as "Yulin Valley"，Considering Wei Zheng、Li Yanshou should not remember to build a big event like the Great Wall，The only reasonable explanation is that "Yugu" is actually called "Yulin Valley" province。"Tongdian" records "The Great Wall of Sui Great Industry is outside the river of this county"，Explain that the Great Wall built in the great cause was in the north of Huaiyuan County, Lingzhou, Tang Dynasty、Northwest of the Yellow River。Based on the landmark of Huaiyuan County，Yutu is located in the valley of a valley in the valley of the Valley of the Wolf Shanxi Duan in the northwest of Langkou County, Inner Mongolia Autonomous Region。According to the "Chinese History Atlas", the northern border of the Tang Dynasty in the Tang Dynasty，Tang Dynasty Ling、Feng Erzhou should be based on Ulanbu bet365 Play online games and、Kubuqi two major desert northern edges and the intersection of the Yellow River are boundary，The regional scope of the northern boundary of Huaiyuan County includes the wolf Shanxi section northwest of Shipou County。Wolf Shanxi Faculty of the West of the Elm tree is named "Yulin Valley" because of vegetation characteristics because of vegetation characteristics，referred to as "Yugu"。Yushu is widely distributed in hillside valleys below 1000-2500 meters above sea level，The south slope of Langshan, which is 1030-2365 meters above sea level, is suitable for large -scale growth of elm tree。Laoukou County, Inner Mongolia is in the two cultural blending areas of the Central Plains and Prairie Nomads，After the rise of the Mongolian, leave the national cultural branding for local local names，There may be a considerable number of Chinese place names into Mongolian place names。The Mongolian pronunciation of "Elm" is "khailaas"，Chinese transliteration "Hyera Su" or "Hyrees"。In Laantou County，The place names close to "Khailas" are only Heellas Khashaan。"Khashaan" means "courtyard"，"Hyera Sun Hu Hot" can be translated as "Yushuyuan"。Because "valley" and "courtyard" are both three -sided geographical space，So you can establish a contact between "Yu Valley" and "Yulin Valley" and "Yushuyuan"。Hyera Sun Hoato is in the northwest of Jinkou County，It is on a certain height of the west of the west of Langshan，Suitable for building Great Wall、Fortress and other military facilities。Therefore，Haira Sun Hulu in the northwest of Qiaokou County, Inner Mongolia Autonomous Region Bet365 app download may be the place where the Elv is from the western end of the Great Wall of the Sui Dynasty。

As for Zhao Jie's "Yugu" is the saying of the Han Dynasty "Large and Small Yugu" in Guide County, Qinghai Province，It seems reasonable，It is actually questionable。The Great Wall built when the Emperor Sui Emperor Northern Patrol of Wuluan County should be in the Langshan Mountains，It is impossible to be located in Tuguhun。Based on the records of "Sui Shu · Yuwen Shu Zhuan" and "Sui Shu · Emperor's Benji" records，Three years of great career Yuwen described Tuguhun，In July of the following year, the Emperor Sui Yang was designed to build the Great Wall of Yugu，Sui Jun obtained Mantou City six days later、Chishui City Dajie。This is the result of the continuous attack of the Sui Army in the past three years，There is no necessarily connection with the construction of the Great Wall of Yutu。Although the Sui Army was severely damaged to Tuguhun, "the hometown is empty"，But the organization of more than 200,000 men in the "Large and Small Yugu" in Tuoguhun's hinterland to build the Great Wall is not easy，Not only facing counterattack risks，Logistics pressure。Four years of the four years of the Emperor Sui Yang, "Exempt the Great Wall Rent of the Great Wall"，Explain that the labor of the Great Wall two times during the great cause is from the area along the Great Wall。Under the background of the five years of great cause，Emperor Sui Yang has no need to build the Great Wall "Defend Tuguhun，The Road to the Western Regions "。

(This article is the "Research on History Geography of the Great Wall of China" (19ZDA188) in the National bet365 best casino games Social Science Foundation of China (19ZDA188)

(Author Unit: Institute of History of Ningxia Academy of Social Sciences)