I wonder if there are any regular classes. I haven't seen them anyway. Ballet can really practice body building (as long as it is a routine dance), but there is a teacher in South China University named He Guihua (online information). You have to inquire about others specifically.
Learning ballet is very tiring. I don't advise you to study in Hengyang. Beijing, Shenyang, Shanghai, Guangzhou and Hainan are all famous.
Tuition (usually two hours for a class) 180- 1 100 (regional differences). Classes are relatively cheap, generally more than 200 per class. Finally, I wish you success! I heard that some people have not learned it for six years, which is very bitter. God bless you first. ....