The difference in the sound stimulation points between line language pronunciation and bel canto singing lies in the different pronunciation principles and different sound effects.

1. The principle of sound production is different: the sound production of line language mainly relies on the vibration of vocal cords to produce sound. Actors adjust the tension of their vocal cords and the flow of air to produce clear, smooth speech. Bel Canto produces richer and more varied sounds through the vocal cords, pharynx, nasal cavity and other parts of the vocal system. The singer adjusts the position of the whistle and controls the flow of air to produce a high-pitched, exciting or soft and moving tone.

2. Different sound effects: The pronunciation of line language pays more attention to natural, clear and smooth language expression. Actors convey the emotions and intentions of their characters through changes in voice timbre, intonation and speed. The goal is for the audience to accurately understand and feel the character's lines. Bel Canto pays more attention to the control of timbre, range and technique. Singers achieve musical and artistic expression by shaping the roundness, transparency and resonance of their voices. The goal is to impress the listener through the beauty and expressiveness of the sound.