2. Black tea, Tieguanyin tea and Pu 'er tea with a high degree of fermentation are not suitable for cold soaking, and the taste is bitter and odorless. The soaking time of different tea leaves will be different. For example, oolong and alpine tea are best soaked for three or four hours, while some green tea will taste after soaking for twenty or thirty minutes. It is best to choose mineral water as the water for cold tea making, or use cold boiled water, which is slightly inferior in taste.
3, cold tea should not be placed for too long, try not to drink cold tea for more than 8 hours, so as not to hurt the stomach. People with cold constitution had better not drink cold tea. After taking cold tea out of the refrigerator in summer, you should try to finish it within two hours.