Xining was surrounded by a half-moon arch, surrounded by "side-wall." "Sidewall" mostly rammed constructed, a small number of stones Lei Qi, is a province in the Ming Great Wall. Heritage and mapping departments in our province the first time, inter-disciplinary cooperation, from May 2007 to August of this year, with "cultural relics departments qualitative and quantitative surveying and mapping departments," to standardize the working methods of operation, the finalization of our province is about the length of the territory of the Ming Dynasty Great Wall 363 km.

Almost been forgotten plateau Ming Great Wall

In 2006, the State Administration of Cultural Heritage launched the Great Wall protection project, and strive to find out the Great Wall "family property", and on this basis to protect the maintenance, rational use of the Great Wall, the Great Wall of resources survey is an important part of this project and implementation of the foundation. This project started when the province was not included in the first phase of the Great Wall of resources released by the national scope of the survey list. After the application by the relevant departments of our province, national investigation of the Great Wall of resources to the scene to survey the project team members, ultimately proves the existence of the Ming Great Wall in our province, and some lots well-preserved, but also feature significant. In May 2007, our province are listed as the Great Wall of resources the scope of investigation and to begin preparatory work.

The basis of Surveying and Mapping Bureau of Survey and Mapping Office of Qinghai Province, Senior Engineer of the province into the territory of the Ming Great Wall Haining resources survey one time for each node remember. "After receiving the task is to investigate the Qinghai heard in the Ming Great Wall, I have spent the past I know that there are the Great Wall of Qinghai. This time while doing the study, I learned, from Xining to Huangzhong, we see the road Many mounds are likely to be part of the Ming Great Wall. "

The main line are located in four counties

In 2007, as Henin-Hardenne, and the staff of the Archaeological Department to carry out preliminary investigations in the mutual assistance, as Henin-Hardenne across a canal, jump on a ridge. At this time, a cultural relics department staff member told him: "You're feet is the Ming Great Wall!" It's so into Haining astonished and think that this ridge unusual, his work is very important.

According to reports, the main line of our province are located in the territory of the Ming Great Wall in Huangzhong County, Chase Hui and Tu Autonomous County, mutual aid Tu Autonomous County, four counties in Ledu County; auxiliary lines are located in the mutual Tu Autonomous County, the Turkish people and Hui Autonomous County, Hualong Hui Autonomous County , in Guide County, four counties, mostly passes in nature. This period of the Ming Great Wall, about 363 kilometers east from the Gansu-Qinghai border village at the turn Ledu County aloe flower Wan beginning, through the ditch to the northwest extension of the ice, and mutual aid county Songhua top phase; from the southwest along the reach mutual Sakamoto Mountain Risk, and the western slope of the Great Wall in Datong County phase; across the West through the empress Mountain Chase Insurance and Huangzhong County-phase; Huangzhong County, Linkou from the incense start arc from north to south ridge of mountains extending to pull together constitute the arch of the Xining Defense system.

After 400 years of sun, wind erosion, our province has been the territory of the Ming Dynasty Great Wall of multiple damaged, some parts have disappeared, but some parts are still well preserved. Natural weathering, rain erosion, landslides are the main reason for the Great Wall has been damaged. In addition, rodent damage, the construction of residential areas, roads or access roads, land formation, expansion of farmland and so damage the wall of the Great Wall. According to Cheng Haining introduction, Chase, a new village and other places not far away from home the villagers are aware of the "side walls" can connect to the Great Wall in Beijing, villagers believe that the last repair "sidewall" of the Soil Fertility good, some villagers in these territories wall planting black thorn, earth washer.

Founded in the mid-Ming Dynasty

Historical data shows that after the middle Ming dynasty, the original Zhumu Inner Loop in the vicinity of Altan this tribe south, thirty-eight years in the Ming Jiajing access to the Qinghai Lake area. In order to prevent the invasion of the Ministry of the East, the Ming Dynasty in the eastern part of Qinghai built side walls, digging trenches, building a defense system. The investigation after the preliminary study found that the basic theme of our province in the Ming Great Wall around Xining Wei (Ming Agent System today Qinghai Xining city), defensive purposes consistent with the literature. Meanwhile, according to literature, in our province the mid-Ming Dynasty Great Wall built in Ming Dynasty, since the beginning of 1546 until 1596 only lasted 51 years. The construction of the process has gone through three phases.

Jiajing quarter of a century the Ming Dynasty (1546) to Longqing six years (in 1572) for the early build-up phase. At this time the Great Wall has built mainly in the Chase, mutual aid, Huangzhong not yet formed a complete defense system Xining Wei; Longqing six years (in 1572) to Wanli years (1574) for the expansion phase, which in our province in the Ming Dynasty into a large-scale construction period of the Great Wall. During these three years were, in Huangzhong, Le Du Continuation of the Great Wall after another thread, but also built Hualong's Hang Yee, Jessica ditch the black forest virgin in Datong County, Huangzhong County incense Linkou squeezed ancillary facilities such as the Great Wall, the Great Wall Xining Wei the basic framework has been formed at this time; Wanli twenty-four years (1596), and finally construct the West Shek Kip Koudao southern foot of the Great Wall Mountain Goddess (Huangzhong) so that the northern and southwestern parts of the Great Wall Xining as a single entity, Qinghai's Ming Dynasty Great Wall, the final shaping.

363 kilometers is how to measure out?

April 18, 2009, the State Bureau of Surveying and Mapping and the State Administration of Cultural Heritage jointly announced the length of the Great Wall of China's Ming 8851.8 km, of which our province in the Ming Great Wall is about 363 km. So, this data is how to measure out?

It turned out that the Great Wall of resources, our province is also the first national survey to measure accurately the length of the territory of the Ming Great Wall, measurements can be divided into field surveys within the industry, industry and the Great Wall of measurements in two parts.

Provincial Geomatics Center of China's Xu Chang-jun, involved in the Ming Great Wall within the province within the industry for the measurement. From September 2008 to August of this year, Xu Chang-jun, and more than a dozen staff members completed the data collection, measurement and control of the air, encryption, the Great Wall length measurement, digital elevation model production of thematic maps, data, results of a large number of post finishing work. In this process, advanced equipment and technology to ensure the accuracy of the measurement. This reporter saw a vision of using the software space, the staff put on three-dimensional glasses, the three-dimensional environment, accurate measurement of a relevant data. At the Great Wall wall (including the walls, stone walls) and three-dimensional measurements are also used retest practices. In other words, each member of the Great Wall along the pros and cons of different operating direction of the measurement time when measuring the length of the two differential and measurement of the ratio is greater than one-thousandth of the length of re-measurements, the final length of the take to meet the requirements to measured value. According to Xu Chang-Jun introduction to photography as the foundation, start a three-dimensional measurement is the most important technical characteristics of this measurement.

After nearly a year of hard work this year, October 23, at the Great Wall of resources survey and mapping project team organizations, relevant experts of heritage held measurement of the outcome of the Ming Great Wall at the sub-province inspection, the experts agreed that measurement results of our province through the acceptance of the Ming Great Wall.