The members of the Chinese Society of Righteous and Harmonious Fists were simply called "boxers" by the Westerners. This was due to the martial arts and calisthenics they practiced. It began as an anti-foreign, anti-imperialist, peasant-based movement that attacked foreigners who were building railroads and violating Feng shui. Christians who they felt were responsible for foreign domination of China were also targeted. In June 1900, the Boxers invaded Beijing and killed 230 non-Chinese. Before it ended, tens of thousands of Chinese Christians, Catholic and Protestants were killed. Most of them in the Shandong and Shanxi provinces.