Ancient arithmetic was divided into four columns: the year column, the moon column, the sun column and the time column, and then after the Universiade, when the pattern was determined, numerology deduction could be made. The sun column, that is, the day when a person is born, is represented by the branches of the lunar calendar. Trunks and branches are recorded every 60 days. Because the month and leap year are different, we need to find a perpetual calendar for daily work and support. The solar column in life science starts from midnight to Shihai clockwise, and it lasts for twelve hours a day, and each hour accounts for two hours. The dividing line between day and day is midnight, which is eleven o'clock in the evening. 1 1 The day before is the day before. After eleven o'clock, it is midnight the next day. Please pay special attention to this point, and don't think that midnight is the dividing point of the day. In ancient times, we divided the annual column, the moon column, the sun column and the hour column into four columns. Later, we launched the Universiade and matched the Ten Gods to determine the pattern, so we could make numerology deduction. How to calculate the sun column is more complicated, because among the formulas handed down from generation to generation, there are only the methods of calculating from the moon in a year and from the morning, that is, knowing the year column and the hour column is the sun column, but there is no method of calculating the sun column. Because the general numerology students must master the annual column within 200 years, the monthly column is easy to know, and there is a formula, and the solar column can be known by looking at the perpetual calendar. Once you know it, you can know the time bar through the formula. However, the blind fortune tellers of past dynasties could not know the time bar by looking at the perpetual calendar, so they had a formula to calculate the time bar besides memorizing a lot of calendars, but they generally swore at school that they could not tell anyone except their children and the blind.
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