Best fit PARSEC isochrone on V vs. (B − V) CMD (panel (a)) and V vs. (V − I) CMD (panel (b)) of Berkeley 34. The black open circles are the member stars of Berkeley 34, the blue open circles are the RC of Berkeley 34, the gray dot symbols are nonmember stars but located inside the radius of Berkeley 34 and the red line is the best fitted PARSEC isochrone model.