Wandering Book sword
PI à ol í ngsh à Ji à n, an idiom, refers to the literati who carry books and swords and study everywhere.
explain
In ancient times, it was said that literati carried books and swords and traveled all over the country.
source
The 56th chapter of Jin Ping Mei CI Hua written by Xiaosheng of Lanling in Ming Dynasty: "although it's a floating book sword now, there are still 100 mu of farmland in my family, three or four with a house to live in."
usage
Used as an object or attribute; used in writing
Wandering Book sword
swear allegiance facing the north - běi miàn chēng chén
commence business , now developed into a grand scale but with hardly anything to start with - téng kōng ér qǐ