What do you mean by "Big Stream and Five Elements"?

Wuxing River is a concept in China's traditional fortune-telling, which originated from the Yin-receiving system of Sixty Jiazi in ancient China. In Yin Na's five lines of sixty Jiazi, Daxi corresponds to people born in Jiayin and Mao Yi, while Jiayin and Mao Yi correspond to tigers and rabbits respectively. The concept of great flow has a specific description in terms of personality and destiny. It symbolizes a dynamic, powerful and ever-changing water flow, and is usually considered to represent a positive trait. Daxi River, which originated from the theory of the intersection of three generations, is a kind of fortune-telling of the five elements of Daxi River, corresponding to the years of Jia Yin and Mao Yi in the sixty jiazi of the five elements. In other words, people born in Jiayin and Mao Yi are "big stream".