Although tea is a healthy drink, if you don't talk about it, you will lose more than you gain. In particular, you can't always make tea in a teacup. The extract of tea itself will be converted into other harmful substances at high temperature for a long time. Overnight tea is better, it will breed bacteria. You can brew it when you want, and pour the tea juice out of another cup to drink, which can not only drink tea but also be healthy ~