1. Realm division: Xuantu→ Xuanshi→ Xuanshi→ Xuanzong→ Xuanjun→ Xuanwang→ Xuanhuang;

2. Exercise division: scriptures, classics, collections, sub-books, volumes, and recipes, scriptures can be practiced to a very high level, and the lowest key is only the method of Xuanzong.

3. Classification of occult arts: heaven, earth, and man, and higher ones are holy level occults.

The basic ones are here, for more interesting and detailed content, please read the text~