What does the 13-story Wenchang Tower represent?

Wenchang Tower is divided into 7, 9 and 13 floors, and each floor has important meaning and explanation. The 7th level represents academic progress and success. The 9th floor represents rising step by step. The 13th floor represents success and fame. The "Three Essentials of Yang House" said: In all capitals, prefectures, counties, where scholars are unlucky and do not pass the imperial examinations, it is advisable to build a Wenbi tower on the four characters Jia, Shen, Bing and Ding. As long as it is higher than other mountains, then there will be scholars passing the imperial examinations. You can also build a Wenbi on a mountain, or build a high tower on flat ground, both of which are Wenfeng. Wenchang Tower, how many floors are best in the Wenchang Tower, where to place the Wenchang Tower, and what are the taboos in placing the Wenchang Tower.