In the twenty-sixth year of the Republic of China, I was Chen Jiu, a beggar living in a Shanghai alley. It was not until I rescued an old Chinese doctor who was dying that I clung to the life-saving rope of "medical skills." After the old Chinese medicine doctor left, I moved to Suzhou with half a medical book in my pocket, and set up a simple medicine stall next to the "Wanqing Teahouse". The proprietress Su Wanqing always gives me an extra bowl of hot porridge, but in the backyard of her teahouse, the sound of secret footsteps always comes late at night. The Japanese army searched closely, and wounded people came to the door frequently. I used my hands to scrape the bones and heal the poison, and took the prescription that contained the information. I don't have any extraordinary abilities, I'm just a doctor who wants to survive, but I saw clearly in the flames of war: saving one person is a doctor, and saving a country is the way to survive.