African Americans [ ... ] are a racially mixed or mulatto people—deeply and overwhelmingly so" (see genetics). After the Emancipation Proclamation, Chinese American men married African-American women in high proportions to their total marriage numbers due to few Chinese American women being in the United States. African slaves and their descendants have also had a history of cultural exchange and intermarriage with Native Americans, although they did not necessarily retain social, cultural or linguistic ties to Native peoples. There are also increasing intermarriages and offspring between non-Hispanic blacks and Hispanics of any race, especially between Puerto Ricans and African Americans (American-born blacks).
Chinese Americans Quincy area. San Francisco, California has the highest per capita concentration of Chinese Americans of any major city in the United States, at an estimated 21.4%, or 172,181 people, and contains the second-largest total number of Chinese Americans of any U.S. city. San Francisco's Chinatown was established in the 1840s, making it the oldest Chinatown in North America and one of the largest neighborhoods of Chinese people outside of Asia, composed in large part by immigrants hailing from Guangdong province and also many from Hong Kong. The San Francisco neighborhoods of Sunset District and Richmond District also contain significant Chinese