The Past of the Republic of China was a novel about the history of the Republic of China. The story takes place in Shanghai in the 1930s and tells the life experiences of a man named Zhang during this period. Zhang was a professional assassin whose mission was to assassinate the political figures and officials of the time. However, during a mission, he accidentally transmigrated to Shanghai during the Republic of China. In this world, he found that he was not the only human who understood modern technology, and he still had to face various dangers and challenges. During the period of the Republic of China, the man surnamed Zhang met many different people, including politicians, businessmen, cultural figures and ordinary people. He gradually realized that he played an important role in this world and also discovered that he had some special abilities. During this period, Zhang experienced many dangerous events, including political struggles, assassinations, fires, and explosions. He also gradually understood the political and social situation of that era and began to think about his future and mission. In the end, he found his place in this complicated world and became an important figure.