Comparison of Metallicity Measurements from LAMOST DR8 and GALAH. The right panel shows the iron relation for 30 000 targets. The y-axis represents the metallicity from LAMOST dr8, while the x-axis represents the corresponding value from GALAH. The left plot displays the metallicity residuals of LAMOST and GALAH, both before and after correction. The blue dots represent the original data selected from LAMOST DR8, while the orange dot represents the LAMOST result after correction.