This is a long series of detective novels focusing on the public security counter-espionage front in the 1950s. It restores the social scene in the early days of the founding of the People's Republic of China in a delicate way. It uses a compact plot to connect exciting sections such as code deciphering, spy tracking, and plan breaking. It shows the wisdom and courage of the public security officers on the hidden battlefield, and uncovers the layers of disguises and shocking conspiracies of lurking enemy agents.
