Tumor occurrence and progression are considered to be a complex progressive process involving multi-level reactions and accumulation of mutations. In the past few decades, there have been many studies on this topic in the field of oncology. These studies mainly focus on tumor cells, tumor microenvironment, tumor heterogeneity, etc., among which tumor heterogeneity is closely related to the occurrence and malignancy of tumors. Cancer stem cells (CSCs), as one of…