wood element is a method of predicting through ancient Chinese eight-character divination, which is one of the yin-yang and five elements theories. Gold, wood, water, fire, and earth elements are all calculated based on the Jiazi Yin-Yang. The term "wood element" refers to those whose Yin-Yang is Mulan Wood, Pine Wood, Great Forest Wood, Willow Wood, Pomegranate Wood, and Flatland Wood. Wood element is divided into several types, such as Mulan Wood, Pine Wood, Great Forest Wood, Willow Wood, Pomegranate Wood, and Flatland Wood.

Metal element refers to the Yin-Yang of one's birth. Those with the Wood element are born in the months of Yin and Mao; those with the Fire element are born in the months of Si and Wu; those with the Metal element are born in the months of Shen and You; those with the Water element are born in the months of Hai and Zi; and those with the Earth element are born in the months of Chen, Xu, Chou, and Wei. These are considered the original hexagrams. If one encounters the "life" element, it indicates wealth and honor. Generally speaking, when we refer to metal element or wood element, we mean the Yin-Yang of one's birth. For example, Jiazi is the Sea Metal, so those born in Jiazi are considered to be of the Metal element. According to the "Ming Gong Shengming Koushui", the Yin-Yang is the main factor in determining one's fate. If the Yin-Yang of Jiazi and Yi Chou is Metal, then they are considered to be of the Metal element. When considering their fortune and the influence of the current year's Tai Sui, the Longsheng Formula is used to determine the good or bad fortune.

People with the Wood element have the nature of wind from the sky. Wind is yang and active, so people with the Wood element are quick and capable, with sharp minds and fast movements, like a gust of wind. However, wind is changeable, so the personalities of people with the Wood element are generally unstable. Sometimes they are like a storm, and sometimes like a gentle breeze. They can be both gentle and stubborn. Their disadvantages include being defiant and not obeying authority, often arguing with leaders. People with the Wood element are wise and reliable, working step by step and able to cooperate with others.