The role of Ding Jian immigrants in the development of American history

Promoted the population growth in the United States. Immigration, as its name implies, can be understood as obtaining residence status or nationality status in other countries. Ding Jian's role in the development of American history is to promote the population growth in the United States. The United States of America is a federal constitutional country, which consists of many overseas territories such as Washington, D.C., 50 states and Guam.