Anti-cancer surgery for 300 years. Hu Kaiwen, a Chinese doctor, gave a lecture on Cinnamomum cassia, which was called "300-year health preservation after anti-cancer surgery". Held on July 27th, 20 18 at Beijing Satellite TV Yangshengtang Program. The guest invited by the program is Hu Kaiwen, who mainly talks about the efficacy and function of cinnamon.