The name is based on the birth date. What is the birth date? It is the year, month, day and hour of the person's birth. The four time nodes correspond to the heavenly stems and earthly branches. They are opposite each other and are exactly eight characters. However, the heavenly stems and earthly branches all have the attributes of the five elements, especially the earthly branches. In numerology, there are also hidden stems in the branches. Naming according to the birth date also relies on the principle of restraint of the five elements. Those who are extremely prosperous will be defeated, and those who are restless will be defeated. Those who are imprisoned will gain it, and those who cannot pass the Five Elements will be allowed to circulate. If you don't say what you mean, you will laugh.