My own personal experience, I lost more than ten kilograms a month.
Don't eat dinner for a month, and don't eat anything except an apple or a glass of milk after four o'clock in the afternoon. I lost more than ten catties in a month. In fact, not eating or eating less at dinner is the best way to keep fit. I couldn't help eating some gruel instead of dinner. But remember not to eat snacks after four o'clock.
Remember to eat breakfast, or you will get stones easily. Dinner is the longest meat, and dinner can be treated as above. Chinese food can still fill your stomach.
People who have meat in their stomachs or are prone to constipation can also buy some cassia seed soaked in water to clear the liver and improve eyesight, moisten the intestines and relax the bowels. Semen Cassiae can also be added with Folium Nelumbinis, Folium Mori and green tea. This is a prescription that almost covers the formula of weight loss products on the market. Actually, I don't deserve five dollars. Ha ha.