"One who fails to reach the Great Wall is not a hero." The Great Wall is known as one of China's symbols. But this majestic ancient building that has stood in China for nearly two thousand years has long lost its original majesty due to the erosion of the years. The Great Wall, the "Great Wall" in our mouth, is the greatest and most majestic military defense project in ancient China. The oldest Great Wall in history dates back to the Western Zhou Dynasty. During the Spring and Autumn Period, the Great Wall built the first climax, and the various vassal states built the Great Wall fortifications on their respective borders. However, the Great Wall during this period was relatively short and relatively low. After Qin and the Six Kingdoms joined together with China, they repaired the Great Wall links of the various vassal states and they were known as the Great Wall. The Ming Dynasty was the last era to overhaul the Great Wall. The Great Wall that we can see this year is mostly the buildings of this period. The Great Wall resources are mainly distributed in 15 provinces, municipalities and autonomous regions such as Beijing, Tianjin, Hebei, Shaanxi, Shanxi, Inner Mongolia, Heilongjiang, Jilin, Liaoning, Shandong, Henan, Ningxia and Xinjiang. According to the National Great Wall Resources Survey conducted by the Chinese Cultural Relics and Surveying and Mapping Department, the total length of the Ming Great Wall is 8851.8 kilometers. According to historical records, the total length of the Qin and Han Dynasties and Great Walls is more than 10,000 kilometers. If the Great Wall resources disappeared due to various reasons such as war, natural disasters and historical invasion, the total length of China's ancient Great Wall resources may exceed. 21,000 kilometers. According to National Geographic, as many as 30% of the Great Wall “is becoming a ruin” due to years of erosion and natural weathering. In order to effectively resist the invasion of foreign enemies, most of the ancient Great Wall was built between the inaccessible mountains and mountains. Even some of the Great Walls “only allow single people to pass”, which limits the effective development of the Great Wall repair project. The British Broadcasting Corporation (BBC) has released a video explaining that the Chinese Cultural Relics Protection Department and the Geographical Surveying and Mapping Department have announced that they will use UAVs surveying and mapping the entire Great Wall, hoping to obtain accurate and up-to-date data, and ultimately rely on the data. Targeted repairs to this greatest project in human history. According to the British Broadcasting Corporation (BBC), the data collected by the drone will help the staff to carry out targeted repairs to the vulnerable parts of the Great Wall structure. In May of this year, the South China Morning Post published an article saying that the relevant departments used MMC's Griffion-M8 drone to carry out the Ming Dynasty Jiankou Great Wall, about 80 kilometers north of Beijing. Remote sensing of the machine, drawing a high-definition three-dimensional image of the Great Wall of the Arrows, helps the weathering of the Great Wall to consolidate the repair work smoothly.