There is a class of cells in the epithelium of the varicocele of the male testis: called spermatogonia, which can develop into spermatozoa. Spermatozoa are mature male germ cells, and their development starts from immature spermatogonia, which become sperm cells after several divisions, and finally develop into mature spermatozoa, which are shed into the lumen of the varicocele after maturation, and then slowly migrate to the epididymis. From the round germinal stem cells, through complex changes (also known as metamorphosis: the process of morphological changes from round to tadpole-like), the spermatozoa with head, body and tail are finally formed, with both precise processing and elaborate forging, which can really be called “a thousand hammers and chisels out of a deep mountain”.