Because There are so many big cities in China I haven't been to, I think it's not easy to answer your question. If I were you I would choose Some,universities in Beijing.

在哪所大学、哪个城市学习中文学费不贵但也不是很廉价？ Shanghai Fudai University ia a good choice.上海复旦大学是个不错的选择。

在哪一所大學學習中文學費平價? 該大學位在何處? 不很貴但是不很廉價 (累贅詞) = 平價 不考慮臺灣嗎? http://140.122.110.12/mtcweb/index.php?option=com_guoyu&task=show_information&id=123&menuid=122&lang=en

如果论生活舒服而言，选择沿海城市较好

others please