Upper panel. The log g versus log T_eff diagram. The Girardi et al. (2000) isochrones for three different ages are overplotted. The black dot represents the position of IRAS 12556–7731. Lower panel. HR diagram of several Li-rich giants. The evolutionary tracks by Girardi et al. (2000) for several masses as labelled are represented with continuous lines. The lithium-rich K-type giants (Kumar et al. 2011) are over-plotted with open circles. The asterisk represents HD 39853, while the position of IRAS 12556–7731 is indicated by the big black dot.