The three fruits are symbolising either Immortality (peach) or Prosperity (pomegranate) or Wealth (citrus). Combined together with the addition of two bats, they convey auspicious wishes for Happiness and Longevity. They are commonly named 'The Three Abundances'.
See some related carved jade groups such as the one representing two peaches and bats from Ip Yee, Chinese Jade Carving, Hong Kong Museum of Art, 21 October-24 December 1983, pp.216-217, pl.195 ; see also the two peaches in A. Forsyth and B. McElney, Jades from China, The Museum of East Asian Art, June 1994, p.398, pl.328
Compare the current example with a very close 'Three Abundances' group sold in our Hong Kong Rooms, 30 October 2000, lot 785 ; see also a similarly carved celadon jade finger citron from Qianlong period, sold in our New York Rooms, 20 September 2005, lot 24