On sky distribution of the APOGEE stars in our initial sample (left) and stellar mass-weighted density projection obtained by superposition of orbits of these stars (right). The top panels cover the entire disc of the MW, while the bottom ones zoom in on the MW bulge region. The orbit superposition technique not only reconstructs the 3D density distribution of the MW disc and bulge but also maps the abundance patterns of APOGEE stars across these components, effectively eliminating the limitations caused by the survey’s footprint and correcting for selection function biases. The reconstructed density shows a prominent boxy/X-shaped bulge structure, which is asymmetric along the longitude due to the bar’s orientation.