The moon is full of fire and the day is strong.

When Jia Mu has a full moon, its wood will become thin. Only when it is neutralized with the five elements can it be blamed. Fortune-telling refers to the act of speculating people's fate, which belongs to the category of metaphysics. The academic research of fortune telling is called Yi Xue, also called numerology. The theoretical core is Yin and Yang, Five Elements, Ganzhi and Fuxi Bagua, and the theoretical system is complex and profound.

In a narrow sense, fortune-telling refers to the calculation and prediction of birth (four-column, eight-character and six-column prediction); Fortune-telling in a broad sense includes fortune-telling, fortune-telling (palm reading), gossip, Taoism and so on. Ancient divination, black martial arts, divination, etc. All belong to the category of fortune telling. Fortune-telling in society generally refers to four-column and eight-character prediction. According to bamboo slips of the Warring States Period, fortune-telling began in the pre-Qin period.