If you enter "polonaise" on Baidu, he will tell you that polonaise is Polish dance, which was developed from the peasant slow step and has elegant dance steps. There is no limit to the number of people, just line up. During the dance, the man's right hand holds the woman's left hand, and they perform ceremonial movements such as saluting each other in a solemn and slow march. It was adopted by the Polish court at the end of the 16th century. It was often used in groups of two to march to the music during ceremonies or gatherings. "Endless Polonaise" is the first part of "Crescent Dance". Even though it is a black novel full of strong European style, it is also a sad love elegy. Professional killers hovering on the edge of life and death, powerful and hidden gangs, cruel regulations, corrupt governments and law enforcement agencies, rainy nights, black windbreakers, dirty bars, cold hymns and sad nocturnes intertwined, what kind of picture will it present to us?