Long’s penis enlargement technique was invented by Professor Long Daochou and named after his surname. In the past 15 years, there have been a series of studies on the penis on four major topics: penis lengthening, penis thickening, repair of most penis defects, and penis reconstruction and nerve transplantation; the world's first penis lengthening and functional reconstruction surgery. We have also completed hair follicle transplantation with thin skin grafts to treat alopecia, and perineal island skin flaps to treat long-segment urethral stenosis. Four achievements have passed the scientific research appraisal, all of which are at the international leading level. One of them won the second prize of the National Science and Technology Invention Award in 2000 (the first prize was vacant).