Describing a person as a quack means that quack knows everything, is experienced and sophisticated, and is called an "old quack". In addition, Jianghu also refers to being chivalrous and doing things with chivalry. Jianghu refers to people who are far away from the imperial court and the ruling class. In many China literary works, especially in martial arts novels, Jianghu refers to the activities of ancient chivalrous men and unruly heroes.

Extended data:

The word Jianghu comes from The Great Master of Zhuangzi: When spring is over, fish are on land. It's better to forget about each other than to be in love with each other.

After the spring dried up, two fish did not leave in time and were trapped in a small depression on land. Two fish can't move. They wet each other with foam to keep each other wet. At this time, it is better to live freely in the rivers and lakes and not know each other.

In addition, the word Jianghu can refer to three rivers and five lakes geographically.

References:

Baidu encyclopedia-Jianghu