Distance of G043.3+03.1. The red contours refer to the molecular cloud footprint, and the cyan points represent the on-cloud stars. The left and bottom right panels are corner maps and estimate the distance of the MCMC sampling (see Fig. 8 for details). The red and green points in the top right panel present RGs and MSs that were distinguished in the observation data, respectively. The dashed black and red lines show the model-fitted RGs and MSs baseline, respectively.