To access the data, click or select the words “Appendix 1.” 1) The centrifuge tube symbolizes sample processing, representing the processes of cell lysis and DNA extraction. 2)The reagent kit and PCR machine symbolize reagent preparation and amplification reaction, enabling simultaneous amplification of multiple targets. 3) The ABI 3730XL instrument (a classic capillary electrophoresis platform) and computer represent the separation and signal acquisition processes. 4) The peak graph symbolizes the allelic detection results of STR loci, visually displaying the “genetic fingerprint” of cells. 5) The computer + magnifying glass symbolize “search and comparison,” verifying through the database whether the cells are the target strain or contaminated.