A working staff member introduces restoration skills of ancient books to visitors at Xinjiang Uygur Autonomous Region Musuem in Urumqi, capital of Xinjiang in northwest China, July 26, 2016. An exhibition displaying ancient books and documents of ethnic minorities in China kicked off here Tuesday. The exhibition, which would show material in languages of 21 ethnic groups in China, will last until Aug. 10. (Photo/Xinhua)
