The source of Confucius' Eight Articles of the Analects of Confucius in the pre-Qin period: "Guan Yu is happy but not lewd, sad but not hurt." -Baidu Encyclopedia. No lewd music II. Harmony of sound and sound: Music is the concentrated expression of sound and the sublimation of sound and sound harmony. The beauty of music or the composition of beautiful sound are inseparable from the harmony between sound and sound. -Xu Mengsheng Cuilan. On laozi's musical aesthetic thought. Monotypic style (scarlatti (1660- 1725) created a free-flowing aria on the basis of cavalli's lyrical tone, giving a broad exhibition space for Bel Canto singing. The level of vocal solo has been improved as never before, which strengthens the main melody style of opera (that is, the single melody style in contrast with polyphony and multi-melody characteristics). ) that is, music in the main melody style. 4. Music Rhetoric: In the Baroque period, some principles and methods of rhetoric once penetrated into all fields of music creation, forming a unique composition technique and theory, namely "Music Rhetoric". -"Music Rhetoric in Baroque Period" and its aesthetic thoughts-journal of the central conservatory of music, 04, 1999.