Why is Lv Dongbin the founder of the barber industry?

Why is Lv Dongbin the originator of the barber industry?

Zhu Hongwu became the emperor of the Ming Dynasty. This Zhu Hongwu is a lump, so whenever a barber is called into the palace, no one comes out alive. Because it is inevitable to shave off Zhu Hongwu's Lalitou when shaving his head, he was killed innocently when he got angry. Later, it was known by Lv Dongbin. He became a barber and should be called into the palace. Strange to say, Lv Dongbin shaved Zhu Hongwu's head with a razor changed from a sword. Even if he touched the sore on his head, he didn't feel pain, only felt a cold and woozy happiness. From then on, whenever the barber shaved his head, his sore no longer felt pain. In this way, no one dared to learn to shave. Later, more people learned, and the shaving industry became increasingly prosperous. They know that this is the merit and blessing of Lv Dongbin's ancestors, so they are very grateful to him and regard him as their ancestor.

Because the legendary Lv Dongbin is proficient in medicine and has the ability to revive the dead, most barbershops also know some small medical skills. Such as scraping trachoma, treating "stiff neck wind", digging scabs, stopping bleeding, blowing sand on eyelids, etc ... This is naturally beneficial to their business.