Make a bag at a time, it is best to make a bag with only one glass of water and drink a cup of strong tea at a time (the stronger the better). Drink 2-3 packs a day on an empty stomach (one before meals and one before going to bed at night), so you don't have to go on a diet, because after drinking for a while, your taste for food will naturally change, and many people don't like dirty and greasy food.

Put a bag of tea in a teapot or teacup, and pour boiling water to drink. It is best to stew for 5-6 minutes, so that the tea leaves will be thicker. Moreover, even if the tea is cold, the effect will not change, and it tastes better after being chilled in summer.