What was the ancient fighting in China? What's the night shift? From what time to what time?

Geng is a unit used by ancient people to measure time at night. A night is divided into five shifts, each shift is approximately equal to one hour. \r\nTime of day and night \ r \ n \ r \ nThe earth rotates once for a day and night, which is called "solar day", and the formation of day and night is thus. The sunny ground is day \r\n, and the sunny ground is night. After the vernal equinox, there are more and more sunshine in the northern hemisphere, so the nights in the northern hemisphere are short and the days are long, but the opposite is true in the southern hemisphere \ r \r\n；; After the autumnal equinox, there are more and more sunshine in the southern hemisphere, so the days in the northern hemisphere are short and the nights are long, but the southern hemisphere is the opposite. \r\n \ r \ nThe method of dividing day and night \ r \ n \ r \ nChina traditionally calculates day and night by twelve hours, which are represented by twelve branches: Zi, Ugly, Yin, Mao, Chen, Si, Wu, Shen, Unitary, Xu \ r \ n and Hai, and each hour is expressed by twelve branches. In this way, each time phase \ r \ nis equivalent to two hours in modern times, such as 9: to 11: . At that time, the sun's shadow was measured during the day, and the time was measured \r\n by dripping water from a leaky pot (a timing tool) at night. But this is not the earliest time measurement method. Before this, it was reflected by the common name in the following table \ r \ n.. The common name in the table refers to a popular name of twelve o'clock in ancient times. This common name, is China ancient people with the help of some natural and biological characteristics to time. "Cock crow" and "people decide" rely on the characteristics of rooster crow in the middle of the night and people go to sleep at night. "Eating time" and "eating time" mean time by eating time. The ancients had two meals a day, and breakfast was \r\n after sunrise and before noon, so it was called "food time". Dinner is after \r\n (the sun is west) and before \ r \ n, so this time is called "the time". The other eight times are named after the position of the sun as the main feature. \ r \ nDue to the different seasons, the specific time difference actually reached two hours, so it was later replaced by the twelve-branch timing. \ r \ n \ r \ nIn addition, in ancient China, there was a time-keeping method of reporting overtime (also called playing overtime). Divide the night into five shifts: equivalent to modern \ r \ n7: pm to 9: pm, 9: to 11: pm to 2: pm, 11: to 1: pm to 4: am, and 3: to 5: am to 5: pm. \r\n \ r \ nIn European and American countries, a day and night is divided into 24 hours, each hour is divided into four quarters, and it can be divided into 6 minutes, and each minute is 6 seconds \ r \ n. As the timer, namely the clock, has only 12 hours, which is only half of the day and night, it can be distinguished by the morning and afternoon, namely, at 12: (24: p.m.), at 1: p.m., at 12: noon, at 13: p.m., at 6: p.m. and at 11: p.m.. \ r \ n \ r \ nThere are two different algorithms for the start and end time of day and night. In Europe and America, 24 hours are counted from : , that is, from 12: at night. \ r \ nBefore midnight is the day before, and after midnight is the day after. The twelve o'clock in China is headed by midnight, with the midnight from 11 \r\n to 1: p.m., the day before midnight and the day after midnight. \r\n \ r \ nIn ancient times, the time was ugly, when it was cloudy, when it was Mao, when it was still present \ r \ nIt is commonly known as midnight crow, when it was flat, when it was sunrise, when it was eating \ r \ nToday's time is 23-1: , 1-3: , 5-7: , 7-9: , 9-11: \ r \ N At noon in ancient times, the time is not at noon, the time is at noon, the time is at noon, the time is at noon, and the time is at noon. \ r \ nToday, the time is 11-13: 13-15: 15-17: 17-19: 19-21: 21-23: . \ r \ nAt the beginning of ancient times, it is noon. The time is used as the name, counting from eleven o'clock at night, the first hour is midnight, from eleven o'clock to one o'clock at midnight. \r\n \r\nHour \ r \ n \ r \ nFrom 23: to 1: \ r \ nFrom 1: to 3: \ r \ nFrom 3: to 5: in Yinshi \ r \ nFrom 5: to 7: in Maoshi \ r \ nFrom 7: to 9: in Chenshi \ r \ nFrom 9: