Recently, a groundbreaking ceremony was held in Xizhazi Village, Huairou District, Beijing for the fifth phase of the Jiankou Great Wall protection and repair project. The entire protection and repair project is scheduled to be completed by the end of November 2026. At the groundbreaking ceremony, Tang Yuyang, a professor at the Architectural Heritage Research Institute of Beijing Jianzhu University and a member of the Great Wall Group of the National Cultural Park Expert Advisory Committee, pointed out that many high-tech methods can be seen in the repair work of the Jiankou Great Wall. However, in the repair process, it is also necessary to follow the "Five Follow Methods" of Mr. Cheng Yongmao, a technical expert in Great Wall repair at the Huairou District Cultural Relics Management Institute of Beijing, that is, "follow the layers", "follow the slopes", "follow the bends", "follow the old", and "follow the remnants", and adhere to the minimum intervention. The protection of the Great Wall, science and technology, and traditional craftsmanship are all indispensable. On July 1st, Shang Jinyu, an engineer at the School of Archaeology and Cultural Heritage at Peking University and the digital technology leader of the Jiankou Great Wall Phase V project, introduced that the repair project of the eastern section of the Jiankou Great Wall (between enemy platforms 117-122 and 117-122) (hereinafter referred to as the "Jiankou Great Wall Phase V project") will continue to carry out full digital recording work, empowering the archaeological, survey, design, and construction stages of the repair project. The digital achievements will be deployed in the cloud and shared with all parties involved in the project, facilitating the latest status of the Jiankou Great Wall Phase V project and improving the scientificity of repair engineering. In the fifth phase of the Jiankou Great Wall project, the ancient Great Wall will welcome its new partners, such as drones and laser scanners. Shang Jinyu has repeatedly mentioned drone aerial photogrammetry - taking panoramic records of surrounding terrain and repair engineering sections in the air, or doing close-up photogrammetry close to walls. The addition of drones allows the construction team to visually see the changes in the Great Wall. The team from the School of Archaeology and Cultural Heritage at Peking University has also creatively proposed a digital solution for the "source scene", in conjunction with and supporting the overall concept of repair engineering - "research while repairing" and "gradual repair". The Science and Technology Daily reporter learned that single digital achievements, such as models, panoramas, and orthophotos, have relatively large data and are inconvenient to use. The "source scenario" can classify and process individual digital achievements, allowing for quick online loading and display without compromising data accuracy, making digital achievements truly usable digital assets. Based on different types of digital assets such as models, panoramas, and orthophotos, the "source scene" can also form a digital scene according to spatial relationships, organically integrating digital assets in the same scene, allowing members of protection and repair projects to use digital achievements more intuitively and conveniently. The "Source Scene" system also supports members of protection and repair projects to annotate information online based on digital scenes, effectively integrating information related to protection and repair projects, and strengthening multi-party collaboration. Shang Jinyu said that in the fifth phase of the Jiankou Great Wall project, more information will be obtained after archaeological excavation, and the survey and design plan may need to be adjusted accordingly. During this process, the source object library and drawing tools provided by the "Source Scene" system can be used for online digital drawing, and "2D" drawings can be transformed into "3D" images. Previously, in the 2018 Jian Kou South Great Wall Protection and Repair Project (Jian Kou Great Wall Phase II Project), the team from the School of Archaeology and Museology at Peking University undertook the digital recording of Enemy Platform 152. This was also the first time in the industry to explore the digital full process recording in the Great Wall protection and repair project. Shang Jinyu revealed that through the records of the pre intervention, post cleaning, and construction of Enemy Platform 152, they found that the inclined pier wall on the southeast side of Enemy Platform 152 did not recover to its original state after dismantling. The repair team made timely adjustments to this. The fifth phase of the Jiankou Great Wall project will further summarize the experience of the second phase of the Jiankou Great Wall project and previous research-based repair work, and continue and develop the approach of digital achievements supporting and cooperating with the entire stage of protection and repair engineering. Shang Jinyu stated that the focus of the next work is to ensure the high precision and efficiency of digital work itself, while promoting further integration of digital achievements with the needs of protection and repair projects. "We hope that the digital recording of the entire process can serve as a demonstration for the protection and repair of the Great Wall in the industry nationwide, and promote innovation in the mode of cultural relics protection engineering," said Shang Jinyu. So, how to tell a good story about the protection and repair of the Great Wall? The Jiankou Great Wall Phase V project is one of the Great Wall preservation projects jointly participated by the China Cultural Relics Protection Foundation and Tencent Charity Foundation (hereinafter referred to as "Tencent Foundation"). Ma Yao, the Director of Tencent Foundation's Cultural Heritage Project, told reporters that as early as the beginning of the year, Tencent Foundation had collaborated with the China Cultural Heritage Protection Foundation and the Beijing Municipal Bureau of Cultural Heritage to create a digital cultural heritage public welfare activity under the theme of "Protecting the Great Wall, Adding Me". The communication team will also systematically record around the Great Wall, and in the second half of the year, they will introduce the archaeology and restoration of the Great Wall to the public through various means. "We hope to use technology to not only assist in the repair of the Great Wall, but also to tell the story of the Great Wall well and promote public participation," said Ma Yao. (Lai Xin She)