Current stellar mass and mean stellar metallicity weighted by light relation. In blue circles are our result with the mean error at the bottom. The green line is from Gallazzi et al. (2005), the magenta line is from Panter et al. (2008), the black line is from Kirby et al. (2013), red Xs are from Kudritzki et al. (2016), violet pentagons are from Zahid et al. (2017), and the orange and yellow lines are the star-forming regions and the mean of all galaxies from Sextl et al. (2023). The blue dots are the results from our work and the blue cross at the bottom represents the mean error of our analysis.