How does Pu Shu forecast the weather?

A strange tree (called "Pu Shu" by the locals) beside Dateng Village in Hexian County, Anhui Province, with a height of 7 meters, a tree circumference of more than 3 meters and a crown area of 100 square meters, is also a veritable "meteorological tree".

According to the early and late germination and the density of leaves, we can know the rainfall of that year.

For example, Grain Rain germinated before, and the buds were leafy, indicating that there was much rain and frequent floods in that year; If the germination is normal and the leaves are sparsely distributed, it means that the weather is good; If germination is delayed and leaves grow less, it is a year with little rain, and severe drought often occurs.