Excuse me, master, are the five elements of the field fire or earth?

Will the fields change in winter and spring? There are five elements in the original branch: dead soil in spring, wet soil in winter, miscellaneous gas and different anger, cloudy and dry soil, bad soil, strength and weakness, and five elements change. According to what theory, given the year of birth, the fortune teller can predict the month of birth of the explorer? If I can't measure it, how do I know how to match this word? Although you can't learn, the theory is predictable.