The Most Powerful Physical Trainer in History

He lived for more than five thousand years. During these long years, his cultivation has always been stuck in the body refining stage, unable to make any progress. He couldn't muster any energy. But one of his punches can shake the heavens and the earth, one palm can break the galaxy, and one hair can cut off the immortal soldiers. His name is Lu An. The initiator of the rise of martial arts civilization. He is also the most disliked son-in-law of the Huang family in Linjiang City.