Density distributions of selected J-PLUS-Gaia-LAMOST dwarf stars in the planes of T_eff–log g, T_eff–[Fe/H], (BP − RP)–G, and different elemental abundances with respect to [Fe/H], all colour-coded by stellar number density. The stellar labels are from LAMOST. Only stars that satisfy the following criteria are used: (1) FLAGS = 0; (2) 0.063 < BP−RP < 1.786; (3) G < 18; (4) err (all J-PLUS filters) < 0.1 mag.