What is Pingyun?

Flat (pinyin: píngzè, English: flat), flat generally refers to the rhythm of poetry. Flat tone is an attempt to dualize the four tones. Four tones are four tones in ancient Chinese. Tone refers to the level, fluctuation and length of sound. On the basis of four tones, the flat tone is summarized through incomplete induction. Flat refers to straight, flat refers to twists and turns. In ancient times, it was raised, lowered, lowered, and the rest was flat. Since Zhou Deqing in Yuan Dynasty, Yin and Yang have been equally divided, with flat tone, flat tone, rising tone, falling tone and canceling tone. From ancient times to the present, the levels of balance are unbalanced, and the dispute between level balance and informal level balance is an eternal topic.