Is Gan Yuan Guidan Decoction True or False?

It's true. He and his disciple Wei Yongpu upgraded the "strange prescription" to a new formula and developed it into today's "Gan Yuan Gui", and there are patents to be found. Ten years ago, I went to Yunnan to find an old Chinese doctor to treat tinnitus and deafness. In recent years, after my old death, I heard that unified delivery was made in Nanjing for the convenience of selling in official website.