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Objective: Long-term stem cell tracking is very important in the field of stem cells.Herein,we report a quantum dot-sized organic dot with aggregation-induced emission(AIE)characteristics as a promising cell tracker for noninvasive long-term tracking of adipose-derived stem cells(ADSCs)in living mice [1].Methods: The stem cell tracking ability of the AIE dots were evaluated and compared with the widely used commercial cell trackers of PKH26 and Qtracker 655.