Distributions of bulge stars in the [Mg/Mn]– [Al/Fe] plane show that there are almost no accreted stars in the unevolved region. The wide coral-colored line represents the evolutionary path that fits the observations. The metal-rich stars in region A and region B show a clear gap in [Al/Fe] values, suggesting the low [Al/Fe] metal-rich stars in region A could have an accretion origin.