The so-called beat is also a beat. It is often coordinated by the hands or feet (↓ is the first half of the beat) and the movement up (↑ is the second half) is regarded as one beat.

The law of intensity of sound:

The intensity of music is not static, so we should also pay attention to the relationship between the intensity and weakness of sounds when beating time. Beats are divided into strong beats and weak beats. These strong beats and weak beats alternate according to certain rules to form a "beat". There is a "measure" between one downbeat and the next. Based on the above instructions on how to beat the beat and the strength and weakness of the beat, we can practice the basic rhythm in big beats (the "X" here is a note without a specific pitch):