Job Recruitment Website - Ranking of immigration countries - What is the definition of immigration?

What is the definition of immigration?

Answer: d

Immigration means that our citizens emigrate or live permanently in a certain area of our country. Only item d meets the definition requirements, and options a and b are temporary business trips abroad, which do not meet the conditions of permanent residence; Option C refers to China citizens who have returned from studying abroad and have not emigrated or permanently resided in a certain area in China, which does not meet the definition. So choose D.