The infamous Chinese Exclusion Act of 1882 was the first law in U.S. history aimed at preventing immigration by a specific nationality. The exclusion law did allow entry of any Chinese who could prove citizenship through paternal lineage.
一八八二年，著名的「排華法案」就在工會領袖和一些政客的推動下通過；「這是美國歷史上第一次禁止特定國籍的人入境和歸化為公民」，埃崙詩集上說。