What are the bottoms of Ganlong jade articles?

Blue-and-white jade poems, Pisces washing, jade carving with dragon patterns, etc. The four-character bottom payment of the year of Qianlong refers to the bottom payment of the year of Qianlong written in regular script or seal script on porcelain, jade, wood and other articles made during the year of Qianlong. The use of this kind of bottom payment began in the early years of Qianlong and continued until the late Qing Dynasty.