Why was chinese immigration restricted in 1882 writing response

In 1882, Congress passed the Chinese Exclusion Act, which, per the terms of the Angell Treaty, suspended the immigration of Chinese laborers (skilled or unskilled) for a period of 10 years. The Act also required every Chinese person traveling in or out of the country to carry a certificate identifying his or her status as a laborer, scholar, diplomat, or merchant. The 1882 Act was the first in American history to place broad restrictions on immigration.

it provided for selection of government employees through competitive examinations. it also made it unlawful to fire or demote covered employees for political reasons or to require them to give political service or payment, and it set up a civil service commission to enforce the law.

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it would be that mali has the worst literacy rate than the others