The right to determine the gender of a boy or girl lies with the man, because the X or Y chromosome in his sperm combines with the X chromosome in the woman\’s egg to form an XX (female) or XY (male) embryo. As a folk prediction tool, the Qing Palace Map lacks scientific basis and should not be used as the basis for gender selection. In modern medicine, ultrasound examination is a reliable method to determine the gender of the fetus.