Tianjin Nankai High School (simplified Chinese: 天津南开中学; traditional Chinese: 天津南開中學; pinyin: Tiānjīn Nánkāi Zhōngxúe) is an elite college-preparatory high school in Tianjin, China. This is the original Nankai High School, and it is often referred to as Nankai High School in Tianjin to differentiate it from Chongqing Nankai Middle School, its sister school in Chongqing.