The ram is a symbol of filial piety, kindness and patience. The three rams, sanyang, are also an auspicious motif, related both to the sun and to male children, as they provide a rebus for sanyang kaitai, the opening up of the new growth in spring, which in turn symbolizes happiness and good fortune.
Compare with a 'three rams' jade group in the Palace Museum, Beijing, one illustrated in The Complete Collection of Treasures of the Palace Museum, Jadeware (III), Hong Kong, 1995, pl. 88, and another larger (22 cm. long) group, also dated to the Qianlong period, from the collection of Alan and Simone Hartman, sold at Christie's Hong Kong, 28 November 2006, lot 1418.