Top panel: Li i 6708 Å spectra of DI Psc (top) and DP CVn (shifted by –0.2). Also shown is a spectrum of the inactive K0.5III giant 16 Vir (shifted to bottom) for comparison purpose. The measured equivalent width of the lithium line of DI Psc and DP CVn is 328 ± 5 mÅ and 316 ± 7 mÅ, respectively. Bottom panels: Li i 6708 Å line fitted by synthetic spectra for DP CVn (left) and DI Psc (right), resulting in logarithmic abundances of log n(Li) = 2.28, and of 2.20, respectively.