Tsai Chin-hsing started to sell medicine pouches from the age of 12, at first accompanying his father on his travels. Now 56 years old, he recalls those itinerant days: "If you were caught without your salesman's ID, or with illicit medicines that you were peddling on your own, you would have all of your wares confiscated and, on top of that, be had up in court."
12 歲就跟著父親「寄藥包」、今年 56 歲仍在城鎮間穿梭送藥的蔡進興回憶：「沒有推銷員證的外務員，一旦被衛生單位查到，如果還夾帶不明廠商私藥，不但藥品會被沒收，還會吃上官司。」