Disadvantages of the method of choosing the first day.

The main disadvantage is that it relies too much on personal subjective consciousness to make decisions and lacks scientific basis and objective standards.

The method of choosing a day to fight belongs to one of the school of choosing a day. This paper mainly discusses the relationship between life and punishment on the basis of five behaviors, namely, sitting on the mountain in the early days, fighting the five elements, and drying the sky and transforming qi, and determines the five stars of Chen Yuan, Lian Zhen, Wu Qu, Wolf Greed and Pojun. Then sit on the mountain to compete for the top five actors, act with four pillars and five actions, and see the five stars transform, enter, give birth, break in and break out to argue good and bad luck. In addition, it conforms to the moon order and the theory of earthly support, and good stars flourish and bad stars die.