1. Eight characters: Eight characters refer to the arrangement and combination of the year, month, day and time of a person's birth, and each element consists of heavenly stems and earthly branches. The horoscope is mainly used in numerology, which analyzes people's character, fate and good or bad luck by revealing their horoscopes.
2. Date of birth: Date of birth refers to the specific values of a person's birth year, month, day and hour. It emphasizes the specific time and can reflect the exact time of birth. Therefore, the date of birth is more commonly used to predict and calculate the fate and wealth of individuals.
3. Four pillars and eight characters: Four pillars and eight characters refer to the heavenly stems and earthly branches with four elements when a person was born. Each element represents a certain meaning and attribute. A person's numerology characteristics, five elements attributes and various fate factors can be calculated through four pillars and eight characters. Four pillars and eight characters are one of the most commonly used methods in numerology.
To sum up, the concepts of eight characters, birth, four pillars and eight characters are the same to some extent, but there are some differences and emphases in their use. It should be noted that numerology is a complex and controversial knowledge, and the interpretation and analysis of the eight characters require professional knowledge and experience.