And while bananas are a good source of potassium, plenty of other foods are high in potassium (more than 200mg per serving), including: Tomatoes and tomato products, such as tomato juice, tomato soup, and tomato sauce. Nuts and seeds. Raisins, prunes, and other dried fruits.
The Chinese Exclusion Act was approved on May 6, 1882. It was the first significant law restricting immigration into the United States. In the spring of 1882, the Chinese Exclusion Act was passed by Congress and signed by President Chester A. Arthur.
China didn't invite in large numbers of Europeans to build railroads only to pull the rug out from under them. The white people that did come to China were not there to work, but to dominate. The Chinese Exclusion Act had absolutely nothing to do with Americans not being able to immigrate to China and being upset about it.