Why did china try to end immigration to the US?

Answer 1

In 1868 Burlingame Treaty, political and labor organizations rallied against the immigration of what they regarded as a degraded race and "cheap Chinese labor." Newspapers condemned the policies of employers, and even church leaders denounced the entrance of these aliens into what was regarded as a land for whites only. So hostile was the opposition that in 1882 the United States Congress eventually passed the Chinese Exclusion Act, which prohibited immigration from China for the next ten years.