Zhang Weiyuan, the ace agent of Chongqing's military command, is famous for his cunning, wit and ruthlessness. Zhang Weiyuan is actually the "Snow Owl", our party's agent lurking in the military. In order to ensure that the "Snow Owl" is always like a sharp knife piercing the enemy's heart and delivering a fatal blow to the Kuomintang at the most critical moment, Zhang Weiyuan has to become the seventh brother of the military in the eyes of his own comrades who can be punished by everyone. The sacrifice on the line caused him to lose contact with the organization. After liberation, he changed his name to Wang Xiaowu, a member of the Kuomintang retainer, and continued to provide important intelligence to the organization in a unique way. After his "kite" identity was confirmed by the organization, he still assisted the Public Security Bureau to crack down on many potential spy agents in a covert manner. During his thirty-year career as an intelligence agent, he was hunted by the enemy for a long time and endured the separation of his wife and children. For him, being an intelligence agent itself means sacrifice, and the ability of a person to sacrifice for the country is the best proof of his own worth.
