Who are the Ngai?  The Ngai comprise one of  the smallest of  Vietnam’s 53 minority groups with an estimated  population of 1,430.  There are five subgroups, made up of three tiny Chinese-speaking communities.   Their name is derived from San Ngai, which means "mountaineers".  Some do live in the mountains, but one famous subgroup, the Dan, are the boat people of Vietnam and southern China.  A 1972 study estimated that over three million Dan people were in China, living along the coasts of Guangdong and Guangxi provinces  and Hainan Island. There are also about 50,000 Dan that live in Hong Kong (as of the 1980's).  Ngai people of the Dan subgroup live in several other SE Asian countries (e.g. Macau), as well. 

The pronunciation of their name is "Nai" .  They are also known as: San Ngai, Dan, Danjia, Tanka, Xumin, Soisangyan, Ngai Hac Ca, Lau Man, He, Sin and Le.

The Vietnamese Ngai are a completely unreached people group.