The cornice on the third floor is 30 cm, can I keep the cornice on the fourth floor?

All right. The roof on the third floor is 30 cm, and the roof on the fourth floor is not allowed. The floating eaves on the third floor can prevent rainwater from invading the floors below the third floor and prevent strong direct sunlight in summer, so the floating eaves on the third floor are 30 cm, and the floating eaves on the fourth floor are not allowed. Piaoyan is a Chinese character, and its pinyin is piāoyán, which means the left and right edges of the house. The cornice is traditionally between 30 and 40 cm, which can be increased or decreased appropriately.