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Figure 2. Pressure visualization through mechanoluminescence. (A) Mechanolumine- scent spectra of SrZnSO doped with different ions; (B) Photographs of the handwritten Chinese characters on SrZnSO doped with different ions^[19]. Reprinted with permission, Copyright 2020, Elsevier; (C) The design and chemical structures of the mechanoluminescent material with isostructural doping; (D) The persistent mechanoluminescence performance of the material within 0.4 s^[26]. Reprinted with permission, Copyright 2024, Springer Nature.