How many floors is the best for Feng Shui Wenchang Tower?

It is generally believed that Wenchang Tower 13 layer of pure copper has the best effect, which can be used by both men and women. Nine-layer jade is the best, girls use white marble, topaz and Yu Nan, boys use obsidian, pure copper, Dragon Turtle Wenchang Tower and so on. Of course, information and use are displayed in the victim's eight characters. It is most effective to choose the number of layers, material and orientation of Wenchang Tower.