There is no "Old Nine Doors" in history, and all the "Old Nine Doors" in the novel were created by three uncles of Nanpai. The nine grave-robbing families in old Changsha mentioned in Southern School's Tomb-robbing Notes are called Old Nine Doors, also known as Nine Doors Prefect.

Old Nine Doors is a prequel to Tomb Robber Notes, which tells the ancestral stories of Wu Xie and others, and tells the daily fragments of their roles in a gentle and short style. It was first published in Super Beauty.

There are nine prefects in old Changsha, and all the other eight lines know it. These grave-robbing families are powerful and involve all aspects of cultural relics smuggling. Almost all the funerary objects inevitably pass through one of them when they flow out of Changsha.

There are different opinions about why it is called the nine-door prefect. The most recognized one is that because there were nine gates in ancient big cities, merchants entering and leaving the city had to choose one of them, which is what the old nine gates meant. To do business in Changsha, they can only choose one of these nine forces, and there is no other way to go.

Extended data:

According to the book Notes on Grave Robbery, during the Republic of China, nine families guarded Changsha, which was called "Nine Magistrates". These nine doors are so powerful that everyone in the eight rows outside knows them clearly. Almost all the funerary objects inevitably pass through one of them when they flow out of Changsha.

Overview of the Nine Doors: The Old Nine Doors are divided into three doors: Upper Three Doors, Flat Three Doors and Lower Three Doors. Go to Sanmen: Zhang Qishan (Buddha Zhang), February Red (Chen Pi A Si's master) and Ban Mei.

Ping Sanmen: Chen Pi A Si, Wu Laogou (the grandfather of the protagonist Wu Xie), Hebei Lao Liu. Next three doors: Huo Xiangu (Huo Xiuxiu's grandmother), Qi Tiezui and Jay (Jay's grandfather).

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