Cold-brewed tea is a very simple way to make tea, which can retain more nutrition and taste of tea. The following is a simple tutorial for making herbal tea:

1. Prepare tea leaves: select tea leaves suitable for cold brewing (such as green tea, white tea and herbal tea) and put them in the brewing pot.

2. Add water: pour cold water or ice water into the brewing pot, and be careful not to use boiling water, because boiling water may cause excessive penetration of tea leaves.

3. Placement: Put the brewing pot in the refrigerator or at room temperature for several hours.

4. Pour out the tea liquid: Herbal tea usually takes 6 to 8 hours to soak. Soaking tea for too long will make it bitter. Take out the brewing pot, gently pour the tea liquid, and do not stir the tea leaves.

5. Matching seasoning (optional): Add sugar, lemon, mint and other spices to taste according to personal preference. Ice cubes and lemon slices are also commonly used in herbal tea.

6. Drinking: Pour the herbal tea into a cup, add ice cubes and lemon slices and serve.

Precautions:

1. Don't use boiled water, it will make the tea excessively permeated and bitter.

2. The soaking time of herbal tea should not be too long, otherwise the tea liquid will become bitter.

3. Herbal tea needs more tea than hot tea.

4. If herbal tea or herbal tea is used, it can be soaked for a longer time (12 hour or longer) to extract a stronger flavor.

The concentration and taste of herbal tea can be adjusted according to personal preference.