Generally speaking, if one has spouses or immediate family filing from the US, it will take about half a year to receive permission to immigrate. Limitations on the adult offspring over the age of 21 are relatively stricter; one must wait about three or four years. If the application is filed by extended family members, the waiting period may be as long as eight or ten years.
一般而言，若有配偶或直系血親在美國提出申請，大約半年內就能拿到移民證件；廿一歲以上的「超齡子女」，限制比較嚴格，大約要三、四年，至於旁系手足提出申請，就得等上十年八年才排得上了。