What does it mean to have bad luck in birth date fortune telling?

Bad fate.

Xue Daoheng of the Sui Dynasty's "Zhaojun Ci": "The concubine's fate is poor, and the emperor's kindness is mistaken." Li Shangyin of the Tang Dynasty's "Disease" poem: "Passionate true fate is poor, easy to ileum." "Ancient and Modern Novels" ·Chen Yushi's Skillful Survey of the Golden Hairpin": "(Master Lu) cried once and sighed once... I don't know why, but it was just his poor life." Chapter 55 of "Dream of Red Mansions": "It's a pity that he I am not lucky enough to be born in my wife's belly.