By the time Ong voyaged to the U.S., Chinese people had a long history here. In the 1800s, America welcomed more than 150,000 Chinese immigrants. Many helped build railroads (see sidebar, below), worked on farms, and owned businesses.
But Chinese laborers worked for low pay, so some Americans saw them as competition. In the 1870s, jobs became scarce, and many blamed the Chinese.
In response, the U.S. government passed the Chinese Exclusion Act of 1882. It banned Chinese laborers from entering the country and put strict limits on other Chinese immigrants. It was the first time the U.S. had limited immigration on the basis of nationality or race.
Angel Island opened in 1910 to enforce this law. About 175,000 Chinese immigrants made the journey. So did immigrants from about 80 other countries, including Japan, India, and Russia. Nearly one in five would be turned away.