Will dantian's voice be hoarse after singing for a long time?

It's not belly singing, it's using the abdomen to make sound, one hand is inserted into the waist, and the other hand touches the fourth finger under the navel. (That's the abdomen) When singing, the abdomen shrinks inward and the waist bulges outward. Is to make sounds with your abdomen. When singing, you should pay attention to "the gas sinks in the abdomen and the sound hangs Yu Mei." It's the breath coming from the abdomen, and it sounds like coming from the brow. If you don't do it, singing in a white voice is just shouting, so in less than 30 minutes, your voice will be like a blaze. I used to sing with a white voice and my vocal cords were damaged. I entered Wuhan Conservatory of Music a year ago and changed it, but my voice was always hoarse. All the knowledge mentioned above was taught by the vocal music teacher of Wuhan Conservatory of Music. Hope to adopt. . .