At that time there were many rules governing the industry. For example, those wanting to learn hairdressing had to first study hair-washing, then facials. From Chang's oral history we can learn about popular hair styles of their day, how long one had to study to become a stylist, and the fact that opening a shop required passing a government exam to get a license.
當年理髮界的種種行規﹘﹘例如，學理髮時先學洗頭，再學修面、當時人流行的髮式、學理髮的時間，以及出師後要開店，得經公家考試取得執照等。