How did the name melody come from in the Eastern Zhou Dynasty?

The musical dream of childhood accompanied mankind into the civilized era. People are still moved by music and continue to create music, exploring the contingency, regularity and attributes of the complex system inside music in a scientific and intuitive way. In ancient times, people began to use mathematics to calculate different melodies (pitch standards of musical sounds) and calibrate different melodies (such as melody, wind rhythm, reed rhythm, chime rhythm, etc.). ) is composed of vibrating materials with different lengths and different calculation methods. Guoyu recorded the musical terms of "Twelve Temperatures" (that is, an octave and twelve semitones) in the Eastern Zhou Dynasty around 500 BC, and divided them into six rhythms and six rhythms according to the whole tone and semitone (the relationship between rhythm and rhythm is a sophomore interval, and the relationship between land and land is a minor interval), and gave each melody a nice name, such as Huang Zhong and Liu Zhong.