 Originally at the start of the 20th century there was a 55% rate of Chinese men in New York engaging in interracial marriage which was maintained in the 1920s but in the 1930s it slid to 20%.During and after World War II, severe immigration restrictions were eased as the United States allied with China against Japanese expansionism.Later reforms in the 1960s placed increasing value on family unification, allowing relatives of U.S. citizens to receive preference in immigration.