sentences:  Among which, only about one-third stated their knowledge of Sign Language.The history of sign language in Singapore can be traced back to 1951 when Peng Tsu Ying left China for Singapore to teach deaf children in their homes.Born in Shanghai, Peng became deaf at the age of 6, and was educated in Hong Kong School for the Deaf (now known as Chun Tok School) and Shanghai Chung Wah School for the Deaf.