That is, the water in rivers, lakes and seas is precipitated and boiled, and then cooled to normal temperature for drinking. Usually, we call unboiled tap water, even pure tap water, raw water. We have all heard the old man say that we can't drink raw water since childhood, which is incredible for westerners who are used to drinking water directly from the tap.
But this is a scientific truth closely related to the health of China people. Because warm boiled water eliminates bacteria and impurities in water, it is closer to the temperature in human body, which can accelerate blood circulation and promote metabolism.
But in China, boiled water is also very particular.
The first vessel for boiling water was mostly made of clay ceramics in ancient times, so the trace elements in clay would penetrate into the water evenly with hot water. Now, of course, iron pots or aluminum pot are used instead, so what we need to do is to keep them clean often enough.
After boiling water for the second time, the hotter the better, and the most suitable temperature is 50 or 60 degrees. Above this temperature, it is easy to burn the mouth, otherwise the sensitivity of the tongue will be reduced.
The water boiled for the third time is not as cold as possible. Usually I don't mind putting cold boiled water in the refrigerator. On the contrary, drinking boiled water with temperature in summer can make you sweat and relieve the heat.
Fourth, don't leave the boiled water for too long, and generally drink it within 16~24 hours. Because stagnant boiling water will also be contaminated with a large number of bacteria and multiply.
The fifth one should be properly matched with condiments according to physical condition. For example, if the humidity is too high, you cannot drink sweet water. On the contrary, you should drink something that can clear away heat and promote diuresis, such as chrysanthemum and coix seed. If you are in poor health, you should add some blood-enriching and qi-invigorating things to the water, such as red dates and angelica.
After reading what I wrote, you will know why people in China can't live without boiled water. And drink properly.