4 novembre 2016
Emerald jade seal with inscription "Ku-hsi T'ien-tzu-chih-pao", Qing dynasty, Qianlong reign (1736-1795)
Emerald jade seal with inscription "Ku-hsi T'ien-tzu-chih-pao", Qing dynasty, Qianlong reign (1736-1795) © National Palace Museum.