Method 1. Just type 1 every day.
Method 2: Eat 1 00g pepper every day for1week.
Method 3: vocal cord surgery 1 day.
Method 4: Keep your voice down deliberately every day to make your voice hoarse for at least 1 year.
If I can help you, please recommend me as the best answer. I want to graduate from primary school! ! Please, sister! !