The Exclusion Act, signed on May 6, 1882 in USA, prohibited immigration of laborers from which country?

At any point did anyone say the word "failure". Of course not. It would be nice if the government would be smart enough to see where we can avoid the errors made in the past & hopefully progress.

Player #31730667, Those who cannot remember the past are condemned to repeat it. - George Santayana

hai sayang