It is the four hours of your birth year, month, day, and hour, and heavenly stems and earthly branches means birthdates. The eight-word heavenly stems and earthly branches has the corresponding words of, which line or two lines are missing. When naming a name, take the missing word or the radical containing that word from the name, which is called "complement", and complete the five lines. Therefore, there are many people whose names contain gold characters, wood characters, or some parts of Jin Mu water, fire and soil in their names.
For example, people born at this moment:
Gregorian calendar: April 19, 214 (Saturday) at 22 o'clock
Lunar calendar: March 2, Jiawu
Eight characters: Jiawu Wuchen Gengshen Dinghai
Five elements: wood, fire, soil, gold and Jin Mu
This one is short of water, which is called water shortage of five elements.