How many days before and after beginning of spring can't break ground?

Beginning of spring, beginning of winter, Changxia, beginning of autumn, 18 days ago, indicating the king of the earth. As a supplement to the 24 solar terms, the earth king is specially divided according to the five elements. Wood, water, fire and gold are based on each other for a while, and soil has no literature for a while. Therefore, there are 18 days in four seasons and 72 days in the whole year. It's called the king of the earth these days. Wood, water, fire and gold are reduced by 18 days every quarter, leaving about 73 days, thus successfully dividing the whole year into five parts. This is the "local emperor" in Hakka folklore. During this time, you can't break ground to build a house, or start work on the wall, and so on.