★ 與領導人接頭的地點要選在公眾地方，等候時間不要超過十分鐘
★ 要擺脫特務的跟蹤
★ 如用電話約見，無論日期和時間都要減一
★ 不要與不是直接聯繫的同志打招呼
★ 記著，在會面中不要查問無關的人物和事情，黨自會讓你知道你需要知道的事
1950年代，中共中央以「隱蔽精幹，長期埋伏，積蓄力量，以待時機」的建黨十六字方針，陸續在香港透過隱蔽的「灰校線」發展地下黨員。有別於「紅校線」，灰校線的社團不在社址內展示國旗和毛主席像，打扮成普通社團般運作，以吸引更多學生加入。本書作者梁慕嫻畢業於香島中學，1955年加入中國共產黨後，成為一名忠貞的地下黨員，受黨的教育及安排，奪取「學友社」內的領導權，並與黨員同志結婚。她為何最終能看透共產黨的黑暗，毅然分道揚鑣，徹底擺脫黨的控制，並矢志將地下黨組織及成員公開昭告世人？她說：「寫，是了斷，也是清洗污垢的最好辦法，更是揭露真相的最好途徑。」
本書以近三十萬字篇幅，詳細揭露中共地下黨的內部組織與運作，細述當年在港親眼見證共產黨奪權及六七暴動的始末！
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