In the early days of People's Republic of China (PRC), the government allocated special funds to collect and sort out ancient books. National libraries have been established in large and medium-sized cities. Many works of ancient Greece were systematically sorted out during this period.
The ideological autocratic policy implemented in Justinian era destroyed some libraries, among which the collections of Alexandria Library and Athens Library were the most seriously damaged. However, folk books are still very rich. Church libraries have developed rapidly, and almost all churches and monasteries have set up libraries. These libraries later became hotbeds for training scholars, and they are still inexhaustible treasures of ancient books.
During the reign of the Latin Empire, the education and academic development of Byzantium stagnated. Western Europe, with relatively backward culture, galloped in the war for feudal territory, consciously or unconsciously destroying Byzantine schools and libraries. They burned ancient books to keep warm. The situation is similar to that of the Germans burning wooden boards engraved with Roman laws in Rome in the 4th-5th century.
In the political movement of national rejuvenation, Byzantine intellectuals set off a hot paste of reviving Greek culture. Byzantine students scattered all over the country gathered in the Nicaean Empire, the political center against Latin rule. With the support of the Laskaris dynasty, they carried out activities to rescue ancient books and cultural relics, or collected and copied ancient manuscripts in the Balkans and Asia Minor, or collated and annotated ancient classics, or set up private schools to impart classical knowledge and organize academic discussions. These activities laid the foundation for the "cultural revival" during the reign of the Pale Oleg Dynasty.