Lien's own story is itself worth a look. At that time he was a 14- or 15-year-old student intern at the institute for tropical medicine at Taipei Imperial University (today's National Taiwan University). As part of the Japanese policy to give first priority to protecting Japanese expatriates living in Taiwan, Lien was sent into a Japanese expat residential area to do a mosquito survey.
值得一提的是，連日清當時還是個十四、五歲的孩子，在台北帝大（即今天的台大）熱帶醫學研究所中做見習生，為了執行日本政府優先保護日僑的政策，被派到僑民大宅子裡做病媒蚊調查，結果難逃毒蚊魔口。