With the US Chinese Exclusion Act of 1882 and the Canadian Chinese Immigration Act, 1923 and other racists policies, the Chinese were made unwelcome in North America. Thus, Chinatowns are a legacy of persistence because in the US and Canada, Chinese and other East Asians were driven out of towns and cities, they were lynched and they were hated.
Big Fight in Little Chinatown looks at three Chinatowns: Vancouver, Manhattan and Montreal. These have managed to survive over a hundred years. The Chinatown in Vancouver was settled between 1886-1920. The Chinatown in New York (Manhattan) founded in the mid-1800s. The Chinatown in Montreal was unofficially recognized in 1902.
Source: Big Fight in Little Chinatown: Review for LAAPFF 2023 – AsAmNews
Ned Hamson's Second Line View of the News 
Thousands of them worked on the railway constructions though … but they are hardly ever mentioned.
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That’s correct, the racism was as bad against them as the indigenous people.
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