A visitor takes pictures of a painting, made at the request of Emperor Qianlong, during an exhibition at the Hong Kong Science Museum, June 25, 2015. The exhibition Western Scientific Instruments of the Qing Court displayed about 120 items collected by the Palace Museum, covering astronomy, medicine, and paintings from the Qing Dynasty (1644-1911). Many artifacts were on display in Hong Kong for the first time. (Photo: China News Service/Zhang Yu)