1965 why did the United States change its immigration policy? What was the background at that time? What is the reason for this change?

The immigration bill before 1965 was a quota system of 1920, which was beneficial to European and American immigrants and very unfavorable to new immigrants from Asia, Africa, Latin America and South America. This spirit runs counter to the surging affirmative action movement in the1960s, when high-tech intellectuals from Asia, especially China, made their mark in the United States. Absorbing these high-tech immigrants in large numbers is also conducive to scientific and technological innovation in the United States. However, in 1955, the pedantry and inflexibility of the US Immigration Bureau in expelling Qian Xuesen were criticized to pieces, which directly affected the change of immigration law.

Therefore, 1965, the United States passed and adopted a new immigration bill, changed the immigration quota, gave priority to the reunion of useful talents in the United States and family members who obtained American resident status, and cancelled the single quota for each country. Since then, absorbing a large number of high-quality new immigrants has become one of the manifestations of American national strength. This change has a far-reaching impact. From 65438 to 0965, the second wave of high-quality Asian immigrants began, mainly international students, supplemented by professionals from various countries. However, the traditional overseas Chinese community or Chinatown with low education level has declined, and this trend has never weakened.