How to accurately calculate eight characters

How to calculate the eight characters accurately? For some reason, parents only remember the child's date of birth, but not the exact time of birth. They only remember the approximate time, which may span an hour, so it is necessary to determine an accurate time from two hours.

Others only remember the date of birth, but do not remember the exact date of birth. All they know is that it may be one day. What's more, they only remember the date of birth and don't know the exact time, so they have to calculate the exact time.

As we all know, people's destiny is calculated according to the date of birth, that is to say, there must be an accurate constellation to predict their own destiny. How to calculate an accurate horoscope?

Jianghu people usually use the number of brothers and sisters to calculate time. This is obviously unscientific. The number of brothers and sisters with the same constellation is not necessarily the same, which means that the number of brothers and sisters cannot determine the constellation. If it is used to determine the horoscope, isn't it a big mistake?

Correct calculation of date or hour, so as to determine the accurate constellation method is:

First, we should reverse the date or hour according to the specific things that happened in the past.

Two, combined with parents, brothers and sisters, spouses, children and other six people.

Third, it is calculated by combining the character, height and appearance of the Lord.