Students listen to a cultural relics expert expounding on how to use a sundial during a summer camp in the Palace Museum in Beijing, capital of China, Aug. 2, 2019. A summer camp organized by the Palace Museum on cultural relics restoration concluded here on Friday. Some 30 student participants across China learned relevant know-hows during the six-day educational activity. (Photos: Xinhua)

Students listen to an expert expounding on cultural relics during a summer camp in the Palace Museum in Beijing, capital of China, Aug. 2, 2019. A summer camp organized by the Palace Museum on cultural relics restoration concluded here on Friday. Some 30 student participants across China learned relevant know-hows during the six-day educational activity.

Students attend a cultural relics restoration lesson during a summer camp in the Palace Museum in Beijing, capital of China, Aug. 2, 2019. A summer camp organized by the Palace Museum on cultural relics restoration concluded here on Friday. Some 30 student participants across China learned relevant know-hows during the six-day educational activity.

Students attend a lesson on the making of ancient sundials during a summer camp in the Palace Museum in Beijing, capital of China, Aug. 2, 2019. A summer camp organized by the Palace Museum on cultural relics restoration concluded here on Friday. Some 30 student participants across China learned relevant know-hows during the six-day educational activity.