Yam Kim-fai
Yam Kim Fai (Chinese: 任劍輝, 29 December 1912 – 29 November 1989), also known as Ren Jianhui was a renowned Cantonese opera actress in China and Hong Kong.
She was most notable for her unique ability to sing in the lower register. That her opera voice was indistinguishable from a male one allowed her to play either male or female roles, though she usually performed male ones.
Read more about Yam Kim-fai: Early Life, Career