What do men mean by eight-character bingzi, wuxu, wuzi and wuwu?

C- is the year of birth, C (before) is heavenly stems, and C (after) is earthly branches, the same below. . .

Wuxu-the month of birth,

Wuzi-date of birth,

Five-five-for the time of birth,

Based on the date of birth of the lunar calendar, the information of good fortune and bad fortune in life is inferred by arranging twelve branches in ten days and restraining five elements.