Flowing Water and Falling Flowers, the Four Great Courtesans in Heaven and Earth

It is a complex novel with "urban suspense and resolving the case" as the backbone, "female group portrait growth" as the meat, and "counterattack cool writing" as the cool point engine. The main line is a suspenseful reasoning line of "checking accounts - overturning the case - bringing down the behind-the-scenes". The sub-line is the sisterhood of the four flowers from being wary of each other to trusting each other, as well as the restrained emotional tension between the heroine and the two male supporting characters.