What is the relationship between inverted Chinese characters and radicals?

Bu is one of the index directories of radicals. His name is "inverted eight heads" because it looks like an inverted eight. There are three words: Lan, Ban, He, Guan, Right, Emperor, Jun, He, Dan, Yang, Zhi, Qian, Sheikh, Zi, Yi, Concurrent, Animal, Pu, Zun, Emperor, Zi, Zeng, Yi. Hey, read it.