Mounting and restoration skills (Tianyi Pavilion ancient book restoration skills), traditional skills. Tianyi Pavilion ancient book restoration skills have been passed down from generation to generation since the Ming Dynasty, one generation follows the next, one generation lives up to the next, one generation surpasses the next, and has developed to form a complete inheritance system. Today, Tianyi Pavilion Museum has established a professional cultural relic restoration center, built a restoration room and laboratory of more than 500 square meters, and obtained the "Paper Movable Cultural Relics Restoration Qualification" certificate issued by the State Administration of Cultural Heritage in 2009. The team of inheritors has also grown and developed. At present, a professional team with provincial inheritor Wang Jinyu as the core and 13 technical backbones has been formed, passing on the torch through the master-apprentice model. At present, the Tianyi Pavilion restoration team has a reasonable structure and comprehensive skills. It not only restores precious ancient books in the collection, but also undertakes rescue restoration projects. According to statistics, 75,000 pages of ancient books have been restored in the past eight years, and 23 projects have been undertaken. It is understood that the Tianyi Pavilion ancient book restoration skills are based on the unique geography, climate, materials, and humanities of Jiangnan, and are a regional experience and knowledge system formed through the continuous practice and accumulation of restoration craftsmen. Its inheritance group is mainly concentrated in Tianyi Pavilion, and the skill system is mainly based on traditional manual methods. The restoration of a whole volume of ancient books requires 28 processes. In the process of collecting and protecting books for hundreds of years, through the ingenuity and wisdom of Tianyi Pavilion restorers page by page, year after year of research and study, and inheritance and teaching from generation to generation, a unique skill system has been formed. Today, the ancient book restoration skills of Tianyi Pavilion have distinctive characteristics such as strict selection of restoration paper, diverse disassembly and exposure techniques, unique repair techniques, and elegant binding. The restored products are full of the atmosphere of Jiangnan books. In 2009, Tianyi Pavilion became the first batch of national ancient book restoration centers; in 2015, it completed the compilation of UNESCO's "Guidelines for the Restoration of Ancient Books and Documents", which became the organization's recommended standard process and teaching model for ancient book restoration to the world; in 2016, Tianyi Pavilion's ancient book restoration skills were listed as Zhejiang Province's intangible cultural heritage projects; by 2020, Tianyi Pavilion was approved as a national ancient book restoration skills training center, and became a national ancient book restoration skills teaching and teaching institution. The Tianyi Pavilion ancient book restoration technique has been passed down since the Ming Dynasty. Its experience has been circulated in the form of physical ancient books and restoration archives. It has been inherited, developed and widely used through master-apprentice training, professional training, experience activities, academic seminars and other forms. Today, it has become a unique skill with distinct regional characteristics. It is highly representative, well-known and well-reputed. It has become a "famous doctor" for the protection and restoration of Chinese classics, played an active role in the construction of "Poetic and Picturesque Zhejiang", and also played a positive role in promoting the spread of China's excellent traditional culture in the world. On May 24, 2021, the mounting and restoration technique (Tianyi Pavilion ancient book restoration technique) declared by Ningbo City, Zhejiang Province was approved by the State Council to be included in the extended project list of the representative project list of national intangible cultural heritage, with the heritage number: VIII-136.