Where is the Nine Transformation Mysterious Gong technique?

Nine Transformations Xuan Gong belongs to the Taoist inner alchemy method and is one of the top Taoist methods.

Nine Transformations Xuan Gong, also known as Eight Nine Transformations Xuan Gong, is a teaching method. In Fengshen Yanyi, it is mentioned that Yang Jian practiced Yuan Gong from Nine Transformations, which was the return to pure Yang from Eight Transformations and Nine Transformations. . At the same time, in the Taoist canon, there is an article about the golden elixir method "Xishu Jade Tripod Immortal Nine Transformations of the Great Return of the Elixir", which should be the source of this method, hence its name.

Introduction to the six gates:

The six gates refer to the collective name of the three law offices. The only entrance and exit to the entire Yamen exterior wall is the gate located directly south of the central axis. This gate is also called the "head gate". It is not a simple doorway, but a building with a roof. This kind of house-style gate is a major feature of Chinese architecture, and its shape is strictly restricted by laws and etiquette.

No matter how big the state or county, the gate can only be three bays (the bay on the front of the building, the horizontal space between the two pillars is one bay). Each room is equipped with two black painted doors, with a total of six doors, so state and county government offices are often commonly known as "six doors". As the proverb goes, "The yamen is open with eight characters, so don't come in if you have reason or money." It is commonly known that the yamen's servants, clerks and other staff are "the activities in the six doors."