The word "Cheng" in Shuowen has the meaning of law, saying "Cheng is also accurate". The title of Jade Law is also process solution, so the title is procedure. As the saying goes, "following the book" means acting like an instrument according to certain procedures.
Instrument, instrument is the rules and regulations of etiquette procedure, French style, etiquette style and etiquette system, as people often say, "salute is instrument."
The rules and procedures for Taoists to do Dojo rituals are based on different forms of different rituals and certain rules of ritual forms, which are called "explaining things according to regulations". As the saying goes, "from the book" is the synonym. Taoism calls this "basic book" a "scientific instrument book", and the "basic book" for a certain ceremony is called "scientific instrument".