A staff worker wipes a museum collection at a hospital for conservation in the Palace Museum in Beijing, capital of China, June 9, 2018. The hospital for conservation opened to the public Saturday, as part of ongoing activities held for China's Cultural and Natural Heritage Day. The first visitors were a group of 40 people, who watched "doctors" repairing some of the museum collections, including calligraphy, painting, bronzeware and clocks, under the guidance of 24 volunteers. (Xinhua/Liu Chan)