Why is ten years considered a great fortune?
When Emperor Xuanyuan fought against Chi You, Chi You was strong and not afraid of swords and axes. As a result, Xuanyuan was defeated and the people were bleeding like rivers. Xuanyuan felt sad in his heart and looked to heaven for blessings. The Nine Heavens Xuannv Empress sent the Ten Heavenly Stems and the Twelve Earthly Branches God Generals to the earth to help Xuanyuan suppress Chiyou, and she also created the legendary Men Dunjia 3,600 styles. Emperor Xuanyuan studied hard day and night, and finally combined the ten heavenly stems and twelve earthly branches into sixty-year-olds, and defeated the general Chi You with three thousand six hundred unique styles. Emperor Xuanyuan then used the heavenly stems and earthly branches to mark the year. Therefore, the Heavenly Stems and Earthly Branches are assigned sixty-year periods, and each tenday is numbered ten. According to the numerology, each tenday is ten years. When calculating fortune with eight characters, don't go beyond the list of stems and branches, that is, use the stems and branches. The sixty-year period is also used for the great fortune of the year. Therefore, luck comes once every ten years.