Interviewer instructions
Question 5: To what ethnic group does (name) belong?
Interviewers fill in the name of ethnic group based on the head of household's response.
Children of a couple who does not have the same ethnicity or adopted child who doesn't have the same ethnicity with adopted parents, they can define their own ethnicity if they are 18 years of age or older. If they are younger than 18 years old, their ethnicity can be defined either by their father or mother.
For those who are naturalized Vietnamese, interviewers report their original nationality.
Note: In border districts, several ethnic groups have nomadic life. Interviewers need to ask and report all of "temporary absentees" at the time of enumeration.