How was the ancient time calculated? For example, how long does a cup of tea, a cup of incense and a meal last?

There are twelve hours in a day, four quarters in an hour, three teas in a while, two fragrances in one tea, five minutes in one fragrance, one refers to six fingers, and one refers to ten moments. A moment is a second.

In ancient times, the time of "a stick of incense" was about a quarter of an hour, but now it is about fifteen minutes. At present, the fragrance duration is short, thick and light; Some are flammable, others don't burn quickly. It cannot be used as a timing reference. The same is true for a meal, which is the approximate length of a time.

The time to drink a bowl of tea is from the end, and then slowly taste it and drink it bit by bit. In fact, it is the time it takes for a bowl of tea to cool down to an edible level.