Checking what is missing in the five elements based on the date of birth is calculated based on numerology. Eight-character numerology expresses the year, month, day, and hour of a person's birth by heavenly stems and earthly branches respectively. The heavenly stems include A, B, C, Ding, Wu, Ji, Geng, Xin, Ren, and Gui, and the earthly branches include Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu, Hai. These heavenly stems and earthly branches correspond to the five elements (metal, wood, water, fire, and earth). According to the five-element attributes of the heavenly stems and earthly branches in the eight characters, you can deduce what is missing in the five elements. For example, if the attributes of the heavenly stems and earthly branches of the date of birth lack gold, then it can be concluded that this person lacks the energy of gold, that is, the missing five elements attribute is gold. This means that this person may lack the energy of gold in terms of career, wealth, etc., and needs to be balanced by supplementing the element of gold. The specific calculation of what is lacking in the five elements can be calculated by professional numerologists. They will analyze it based on the attributes of the heavenly stems and earthly branches of the date of birth, and provide corresponding supplementary methods. This method mainly provides certain reference and guidance for personal character, health, career, marriage and other aspects. But it should be noted that the absence of the five elements does not mean that it is bad or defective, but that it requires adjustment and balance.