Reasons for Asians to immigrate to North America (geography)

Mainly the export of labor services, that is, making a living overseas.

Go to China, go to the United States, go to San Francisco for mining.

At that time, the American government should not allow Americans to go abroad, so it was basically impossible to do business in North China (and China).

At that time, Kang Youwei encouraged overseas Chinese to do business in Mexico to raise funds to support the political reform.

Of course, in the twentieth century, there may be political reasons.

If you want to add international students, it was organized by the government at that time, but many people stayed, which is considered immigration. . .

There is also a condition: discover the new continent and open up new routes.