Some other ancient books on show at the event. [Photo by Wang Ru/China Daily]

"Originally, the custom was not specifically carried out on Qixi, but it always took place in the hot summer months. Since Qixi happens to fall during this period, people started to show off their books during the festival," says Zhang Zhiqing, deputy director of the National Library of China.

In keeping with this tradition, the National Library of China has teamed up with the Confucius Museum in Qufu, a county-level city in East China's Shandong province, to organize the first Chinese Traditional Book Sharing Conference. Opening on Aug 7, the day of this year's Qixi Festival, the conference and related book sharing events will run through Sept 6 at venues located across the country.

A day ahead of the event's national launch, a number of precious ancient books went on display at the Confucius Museum in Qufu, including The Analects of Confucius, documents kept by the Kong family and rubbings from ancient stone inscriptions.

Wei Li, a bibliophile based in Beijing, says he was most impressed by a set of rubbings of 13 Confucian classics carved in stone under Emperor Qianlong's (1711-99) reign in the Qing Dynasty (1644-1911). "They are precious not only because they may have been given to the Kong family by the emperor, but also because they show some royal techniques never seen in folk art," says Wei.