This file photo taken on June 11, 2019 shows workers airing woodcut printing blocks on a roof at the Dege Sutra Printing House in Dege County of Garze Tibetan Autonomous Prefecture, southwest China's Sichuan Province. Built in 1729, the Dege Sutra Printing House preserves in good condition 325,520 woodcut printing plates containing significant Tibetan classics dating back to the 11th century. The majority of the blocks were carved between the 18th and mid-20th centuries.

The printing blocks housed at the Dege Sutra Printing House in Sichuan were listed in this May as documentary heritage on the Asia Pacific regional register of UNESCO's Memory of the World (MOW) Programme. (Photo by Gong Zihua/Xinhua)