High Quality Content by WIKIPEDIA articles! United States v. Wong Kim Ark, 169 U.S. 649 (1898), was a United States Supreme Court decision that set an important legal precedent about the role of jus soli (birth in the United States) as a factor in determining a person`s claim to United States citizenship. The citizenship status of Wong—a man born around 1871 to Chinese parents who were domiciled in the United States—was challenged, based on an 1882 law restricting Chinese immigration and prohibiting immigrants from China from becoming naturalized U.S. citizens. Eventually, this issue reached the Supreme Court, which ruled in Wong`s favor, deciding that the citizenship language in the Fourteenth Amendment to the Constitution could not be impaired in its effect by an act of Congress.