當年，1942年3月10日，主力是禁食；其次轉行送外賣。
https://www.grs.gov.hk/ws/hip/tc/occupation.html
https://tw.news.yahoo.com/%E3%80%8C%E8%A1%9D%E7%A5%A8%E6%95%B8%E3%80%8D%E7%B6%B2%E5%9D%80%E5%88%A5%E4%BA%82%E9%BB%9E%EF%BC%8
https://www.hk01.com/%E5%8D%B3%E6%99%82%E4%B8%AD%E5%9C%8B/60217073/%E6%94%9C%E5%B8%B670%E8%90%AC%E5%85%83%E6%B8%AF%E5%B9%A3%
https://www.bbc.com/zhongwen/trad/china/2015/08/150814_wwii_hongkong_military_yen