 Complete the following phrase:  Upon arriving in China, Hoover developed gold mines near Tianjin on behalf of Bewick, Moreing and the Chinese-owned Chinese Engineering and Mining Company. He became deeply interested in Chinese history, but quickly gave up on learning the language. He publicly warned that Chinese workers were inefficient and racially inferior. He made recommendations to improve the lot of the Chinese worker, seeking to end the practice of imposing long-term servitude contracts and to institute reforms for workers based on merit. The Boxer Rebellion broke out shortly after Hoover arrived in China, trapping the Hoovers and numerous other foreign nationals until a multi-national military force defeated Boxer forces in the 