If you don`t look down on Chinese, you won`t have problems in China. People are friendly and nice with foreigners almost everywhere. Shijiazhuang is the capital city of Hebei province. You won`t be the only foreigner there. Some years ago, I taught in Inner Mongolia, Hunan and Jiangxi with only 5-7 foreigners in the same town. Even so, it was not boring. But if you speak some Chinese, you will get a lot of friends at school and among locals.
The cost of living is not high in China. You will spend 1000-1200RMB/month in a city like Shijiazhuang.