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Long persistent luminescence (LPL) materials have been widely applied and investigated in the fields of night‐safe, bio‐fluorescent labeling, and optical anti‐counterfeiting because of their unique properties of delayed luminescence. In this work, the focus of this research is to significantly improve the LPL properties of Li2Zn0.9992Ge3O8:0.08%Cr3+ by adjusting the ratio of Li+/Zn2+. On the one hand,...