It is a kind of honorific greeting for educators in classical Chinese letters, which is usually written at the end of the letter, indicating that the teaching work is safe.

"Qi", reading Qi, two sounds, auspicious. "Poem Elegant Walking on the Reed": "Handcuff Wei Qi to attract scenic blessings" means that longevity is the greatest good luck, and pray for great blessings.

Teaching spirit is a respectful word for educators' blessing. Usage, for example: (Sir:) Thank you for your guidance. I want to praise you.

Classical Chinese is relative to the vernacular Chinese after the New Culture Movement, and there was no such thing as classical Chinese in ancient times. It is characterized by paying attention to the use of allusions, parallel prose and neat melody, including strategies, poems, words, songs, stereotyped writing, parallel prose and other styles.

After the modification of literati in past dynasties, it became more and more flashy. Han Yu, a great writer in the Tang Dynasty, initiated the "ancient prose movement" and advocated returning to popular ancient prose. The classical Chinese in modern books are generally marked with punctuation marks in order to facilitate reading and understanding.