Musical instrument notes are an important part of the ceremony. There are many etiquette notes before the Tang Dynasty recorded in Sui Shu Jingji Zhi, such as Liang Ji Etiquette Notes, Liang Bin Etiquette Notes, Fierce Instrument Notes, Wuyi Notes, Jiaxu Notes, Fengchan Documents, Qi Lu Boyi and so on. It has been recorded in all dynasties since the Han Dynasty. As for the reasons for Yi Zhu's prosperity, Sui Shu summed up two points. One said, "Six relatives and nine families are different." Another said, "When you die from medical care, you will have a lot of prestige." The actual reason for holding the ceremony is the same as the overall reason. In the Tang Dynasty, rituals such as meditation, sacrifice in the southern suburbs, tomb patrol and sacrifice in Mingtang were recorded in writing. The main part of the Tang ceremony that can be seen now is the musical instrument notes. Generally speaking, musical instrument notes are the etiquette to be used soon. Before each big gift, the company is ordered to write the bill first.

Musical instrument notes are the musical instruments in the ceremony, which pay attention to the musical instrument parts of advancing, retreating, pitching, rising, falling and twisting. Although it is not as good as a ceremony with substantive content, it still plays a guiding and binding role in the implementation of order. The item "ritual vessels" attached to Volume 8 of Tang Dynasty is a note on Guan Zen vessels written by Zhang in the 12th year of Kaiyuan. Among them, there is a cloud: "Sheep taping under five stars, all ministries prepare chang yi according to orders, and it is like another instrument (there is no sheep taping under five stars in Zen ceremony)". If this is correct, then it is necessary to prepare the sheep for worshipping Mount Tai, while it is not necessary to prepare the ceremony for Zen Master Liang's instrument. The provisions of the order still depend on whether it is necessary to annotate the documents.

It is worth noting that some musical instrument notes are arranged in order. Li 13, Volume 53 of Tongdian, said: "In the second year of Jinglong, the Crown Prince gave him a personal explanation of Chinese studies, with the note of Cao, so that all his followers rode horses and dressed. Liu Zixuan, the son of Prince Zuo Shu, said, "The ancients ... took horses as robes. ..... Praise the belt, hold your head high, which Benfei immediately applied. ..... His horse riding and clothes are stolen, so it's better to change them from junk. "Is the prince's order attached to external propaganda, or is it included in the order as a routine?" In this way, the explanation of "I don't ride a horse, I don't wear a dress" has become a new order system, which should be added to the order of the Tang Dynasty as "Jinglong Zengling".

How many notes were written on the order? It is still difficult to estimate accurately. Musical instrument notes are only used for a period of time, and then put aside after use. Sometimes, the difference between the front and back notes will also bring about the change of order. Order today, modify it tomorrow, and make it stable. For example, in the Tang Dynasty, the father of the reigning emperor should match the God of Tang Ming. Wu De ordered Yuan Di to attach himself to Tang Ming; Emperor Taizong died and Emperor Gaozong succeeded to the throne. Should have entered Tang Ming Solo, but does not move to worship (Emperor Gaozu), so the decree ",the word was actually made" Emperor Gaozu took five emperors in ",and" Emperor Taizong took five emperors in ". Therefore, in the year of Emperor Qingyuan, Sun Chang Wuji proposed that since "there is no generation of two emperors in Mingtang", it is required that "the round hill should be used to worship ancestors with the Heaven Emperor", while Taizong should be used with the Heaven Emperor in Mingtang. The above unreasonable laws need to be changed.

Studying the genetic relationship between Yi Zhu and Ling De is beneficial to the restoration of Ling De in Tang Dynasty. The notes of the documents at that time were the source of many laws. At this point, even in the Song Dynasty. Volume 48 of "Taichang Yin Ge Rites" describes the requirements of the ceremony officials in Jingdezhen, Song Zhenzong in the fourth year: state and county sacrifices, asking the secretary to bring all the etiquette styles and write laws, which is one of the obvious examples.