Jing-Jin-Ji cluster is an expanded urban agglomeration consisting of Beijing (Jing), Tianjin (Jin), and Hebei (Ji). It is the biggest urban agglomeration region in North China, including an economic region surrounding the municipalities of Beijing and Tianjin, and along the coast of the Bohai Sea. This emerging region is rising as a northern metropolitan region rivaling the Pearl River Delta in the south and the Yangtze River Delta in the east. In 2020, Jingjinji had a total population of 110 million people, comparable to that of the Philippines.

Hebei is a province in North China. Hebei is China's sixth most-populous province, with over 75 million people. Shijiazhuang is the capital city. The province is 96% Han Chinese, 3% Manchu, 0.8% Hui, and 0.3% Mongol. Varieties of Chinese spoken include Jilu Mandarin, the Beijing dialect of Mandarin, and Jin Chinese.