The eight-character is one of the traditional numerology in China, which infers a person's fate according to the date of birth. Eight-character luck means that a person was born in the year of Hai, and there is the word Hai in the eight characters.
It should be noted that the eight-character prediction is not scientific, and its accuracy cannot be scientifically verified. Therefore, the eight-character prediction can not be used as a standard to judge a person's fate, and we should change our destiny through our own efforts.