Beijing Hanlong Industry Co., Ltd. has an experienced team of document restoration personnel, equipped with professional document restoration tools and advanced document restoration equipment, which can provide restoration services for paper documents such as ancient books, archives, classics, calligraphy and painting, manuscripts, newspapers, maps and rubbings. When repairing damaged documents by hand, we should strictly abide by the relevant standards and norms, "Repair the old as the old, rather shallow than deep, rather thin than thick", and the selected repair scheme is "reversible". The company's literature repair service has been recognized by many senior literature repair experts. The company has undertaken the restoration projects of national and provincial libraries, archives, ancient books, calligraphy and painting and other paper documents for many times, which has won the unified attention and praise of users and social media.