What does it mean to "laugh at the world and sink to the north"?

The famous mountain in Ghost Town claimed that the poem "Laugh at the scholars in the world and sink the soul in the north" was written by the poet Li Bai after visiting the famous mountain. It is not only widely publicized, but also gilded on both sides of the archway at the entrance of the famous mountain.

However, in 1993, when Liang Congjie, a member of the Standing Committee of the Chinese People's Political Consultative Conference, visited a famous mountain, he found that Li Bai's poems had been tampered with. The original sentence is "Laugh at the scholars in the world and sink the soul in the north."

"Luo Yong" is a Taoist fictional underworld, but it is not real. Beiluoshan is Luoshan. Taoism says that there are six days on the mountain, and ghosts and gods decide life and death. The mountain is in the north, so it is called "North Luotan".

However, some people in Fengdu County changed the next sentence of this poem to "Sinking the Soul in North Du Feng", trying to prove that the ghost town in Du Feng has a long history through the mouth of the great poet of the Tang Dynasty. In fact, Li Bai has never been to Fengdu, nor has he written any poems specifically for Fengdu. In his time (Tang Dynasty), Fengdu wrote "Feng", which was ignored. It was only in the Ming Dynasty that he converted to Du Feng.

Laugh at the scholars in the world, and the soul sinks to the north. It means: the people who dare to laugh in the world, after death, sink their souls and go to Beiluoshan for trial.