What is the meaning of Flying Sand Turning in the Wind

The title of "Flying Sand Turning in the Wind" comes from the name of the theme song of the classic jianghu film "My Days in the Triad" starring Chow Yun-Fat, but the content is a mixture of "Goodfellas" in "Triad" of "Infernal Affairs". Among the three films, "Goodfellas" is the past struggle of Hong Kong people, is a collective memory belonging to the people of Hong Kong,[1] "Infernal Affairs" succeeded in injecting new vitality into the story of undercover agents, specifically reflecting the identity crisis of the people of Hong Kong after the return of Hong Kong, "Triad" surprise lies in the finger on the political situation in Hong Kong, "Flying Sands Winds in the Wind" will turn the triad society into an extremely spoofing stage, and succeeded in turning the classic gangster film into a symbols of dissimilarity.