What are the taboos of long summer feng shui?

This is from Song of Four Seasons and Eight Seasons, which is about the prosperity of five elements. Wutu in Changxia belongs to Ruwu, and Ruwu comes from Changxia. The first five days are when the five lands are flourishing, and the last ten days are the season of Geng Jin, with four characters on it instead of their own characters. You typed the wrong word, and then C fire was on duty. Then it's full, and then it's C fire season. The content of eight characters is not feng shui/