Spy war in the Republic of China, peak undercover

A righteous soul traveled to the 22nd year of the Republic of China. At that time, the Japanese were already preparing to attack China. Lu Yang, a Chinese student, was recruited to join their spy organization. He was used by the time traveler and began his thrilling journey of Mission Impossible. He started as a grassroots policeman in the National Government and was successively recruited by the Central Bureau of Investigation and the Military Bureau of Investigation. Later, he was promoted to the rank of Lieutenant General. During this period, he used his identity as a cover and various relationships to continuously improve his identity and get access to more core secrets. He made silent contributions to the great liberation of the motherland. The protagonist is decisive and never shows mercy to the enemy. ...