(n.) a Chinese divination guide and almanac (a fortune telling calendar)
Definitions (粵典–words.hk)
名詞
即係通書;係一本包羅萬有嘅日曆,除咗農曆嘅日子、節氣之外,好多時仲有生活資訊、每日宜做、忌做嘅事等等,方便讀者參考(量詞:本) euphemism of 通書(tung1 syu1); traditional Chinese almanac based on the lunar calendar which tells what is suitable to be done on each day
During the time of Qing Dynasty, there were no English lessons in most of the schools in Hong Kong. If one wanted to learn English, one had to follow the Chinese Almanac to learn Chinese Pidgin English.