Why are the floors of ancient towers, pavilions and terraces in China generally odd, such as three, five and seven floors?

After pagodas were introduced into China from India, influenced by China's architectural art, most pagodas were in the form of pavilions, and the level and plane graphics of pagodas were influenced by China's thought of Yin-Yang and Five Elements. How many floors are there in Ruiguang Mansion? Yes, it should be the seventh floor. Why is it seven floors instead of six or eight? Because according to the theory of yin and yang of the five elements: even numbers are yin, odd numbers are yang, yin is the ground, and yang is the sky. The plane figure of the tower is on the ground, which should be even; If the number of floors of the tower is up, it should be odd. Generally, a tower has seven floors, and the so-called "seven-level floating map" is synonymous with the tower.