Every syllable in Mandarin has a certain tone.
However, in a certain language environment, some syllables lose their original tone in words or sentences and are pronounced as a relatively short and light tone, which is called "light tone". ? Light tone is a sound change phenomenon in syllable linking. In general, the syllable in front is the upper tone, and the tone in the back is slightly higher. The first syllable is flat tone, rising tone or falling tone, and the last syllable is light tone.
When tone sandhi syllables are issued continuously, the tone values of some syllables will change, which is tone sandhi. One-stop study abroad strategy in ing.com