2. Turn off the flame and lower the water temperature to 85 or 88 degrees Celsius. Use the mercury thermometer to measure the water temperature and be careful not to have the mercury thermometer touch the bottom of the stockpot.
3. Stir 100 grams of tea leaves into the stockpot until well blended.
4. Cover the stockpot with the lid and let the tea leaves infuse for 7 minutes 30 seconds.
5. After infusing the tea leaves, please stir everything well, strain the tea leaves out and pour the tea into a tea barrel.
6. Add 2 kilograms of ice cubes into the tea barrel and stir well.