Chen Hua-han is the sole sales representative left in Pingchen in Taoyuan County. He started his career at age 28, working for the Ying-antang Pharmaceutical Company.
做這行要不畏風雨寒暑，有時還會有生命危險；冬天為了擋風禦寒，蔡進興會在身上包報紙；他曾經在送貨時騎摩托車經過年久失修的木橋，木橋突然應聲斷掉，整個人摔下河床，昏迷了 3 小時才醒來。