"Purple Wisteria" is a series of flower language works created by the author Xiang Juan, with the main line being wisteria flowers. The whole book is divided into four volumes, and this book is the fourth volume, including the contents of Chapter 111 to Chapter 146. When Gan Zilai was undecided on whether to prioritize finding a good home for herself in order to realize her ideals, the tragic death of her sister Lan Xier and the death of her mother strengthened her belief in pursuing her ideals and eventually abolished the official prostitution system.