Metallicity offset between galaxies in overdense and field environments. The blue line shows the offset of MZR between cluster and field galaxies, with the shaded region representing a 1σ confidence interval. The single blue diamond shows the offset between the mass-matched cluster and field samples. The measurements in literature (Wang et al. 2022; Kacprzak et al. 2015; Sattari et al. 2021; Kulas et al. 2013; Chartab et al. 2021; Shimakawa et al. 2015; Valentino et al. 2015) are also shown for comparison, each marked in different colors. The error bars represent 1σ uncertainties.