Immigrants formed ethnic neighborhoods in places like New York City's Little Italy and Lower East Side in the late 1800s/early 1900s. While they recreated customs from their homelands, Americans questioned if they could adapt. Chinese immigrants also faced unfair treatment - they worked for low wages but white workers blamed them for lowered wages. This led to the 1882 Chinese Exclusion Act, the first law to restrict immigration to the US by ethnicity which banned Chinese immigration for 10 years.