I Have an Upside-Down Knife

The world-famous sect master of Ruyi Tower was framed and fell off a cliff. The modern man Chen Duling was reborn into him, only to find that the sect master was not dead, but in the same body as him... A pair of strange rivers and lakes partners set off on the road, and then walked another 12,000 miles of rivers and lakes, completely digging a hole in this palm-sized rivers and lakes.