Li Shizeng said that when animals die, their whole bodies will be stiff, and toxins will be produced in their bodies. Regular consumption will make people poisoned. Cai Yuanpei felt reasonable after listening to it, and also recalled Tolstoy's tragic description of "a carefully raised pink pig was slaughtered", which was deeply touched, so he sprouted the idea of being a vegetarian.
Cai Yuanpei said that "vegetarian food has three meanings: one is hygiene, the other is abstinence from killing, and the third is fasting". His vegetarian diet is mainly based on abstinence from killing, because everyone loves life and hates death. As for "hygiene", the most important thing is to avoid alcohol and tobacco, but I can't do it myself; As for "frugality", in foreign restaurants, people who eat meat buy tickets in long queues, and they are vegetarian and specialize in cooking, but there are no bargains.