The
Sán Dìu (also known as
San Deo,
Trai,
Trai Dat and
Man Quan Coc; ;
Chữ nôm: ;
Vietnamese alphabet: Người Sán Dìu) is a
Yao ethnic group in northern
Vietnam who speak
Yue Chinese (
Cantonese), a Chinese language. Although the Vietnamese government classifies San Diu as an independent group, San Diu people are originally a part of Chinese people in Vietnam. They are believed to have migrated from
Guangdong, China around 1600.