The term "Tai (胎)" refers to conception, indicating the time when a person is conceived or when all things begin to sprout in the earth. Tai is like a seed starting to germinate, similar to a child forming in the mother's womb. Generally, if Tai is in the year pillar, it suggests poor health conditions, necessitating considerable maintenance; if Tai is in the month pillar, it indicates significant career changes during middle age, with some changing professions, some starting businesses, and others facing unemployment; if Tai is in the day pillar, it suggests a career with many changes in youth, followed by prosperity and development in middle age. Note! There will inevitably be a major illness in life, hovering between life and death; if Tai is in the hour pillar, it indicates children with a relatively introverted personality, requiring enhanced education.

Generally speaking, a Bazi (八字) chart with Tai is typically an ideal type, primarily suited for freelance design-oriented professions. Such individuals are usually born with weaker constitutions, do not prefer to inherit their father's profession, lack grand ambitions, and are content with their current lifestyle. There is also a sign of two marriages, suggesting that men should marry late and employ the method of hiding and avoiding, while women should guard against an unsuccessful first marriage.