Centenarian Monk Doesn't Understand Technology

Chen Huaian, who had been in seclusion on a certain mountain for hundreds of years, discovered that the world had undergone earth-shaking changes as soon as he came out of the mountain. The spiritual power no longer exists. There is an iron thing that can run faster than a horse and can enter it. There is also a big iron thing in the sky. Men and women are dressed in strange and ugly clothes... Chen Huaian, who is separated from the world, is curious and unfamiliar with everything. But there is one thing that Chen Huaian is familiar with, ghosts! They are still causing trouble in the world. In order to keep his original intention and promise, Chen Huaian can only kill the demons and ensure peace for the rest of his life!