Left and central panels: CMDs. The mean uncertainty is given in the upper-right part of the panels. The solid red line represents the 1 Myr isochrone combined from the PARSEC and BT-Settl models at 1 M_⊙ (Bressan et al. 2012; Chen et al. 2014; Baraffe et al. 2015). The reddening vector of Av=3 mag is shown (Wang & Chen 2019). The dashed black line in the first two panels represents the 90% completeness limit, the dotted black line the 50% completeness limit, and the solid black line the 20% completeness limit. Right panel: CCD. The solid red line is the isochrone, as in the CMDs. The dashed red lines are parallel to extinction vectors, while the red crosses represent Av=0, 5, and 10 mag. The dashed-dotted magenta line represents the T Tauri stars’ locus, with the corresponding uncertainties shown as dashed blue lines (Meyer et al. 1997) transformed to 2MASS system using the Carpenter (2001) procedure. The average uncertainty is given in the lower-right corner in the right-most panel; in other panels it is in the top-right. The starting points for the left and middle reddening vector are determined by the masses in the model (<0.5 M_⊙ and ≥0.005 M_⊙, respectively), while the right reddening vector is from Mužić et al. (2017), adapting the locus of Herbig AeBe stars from Hernández et al. (2005).