Question: Does Erenhot or Hengshui have more inhabitants?

Context paragraphs:
Hengshui: Hengshui () is a prefecture-level city in southern Hebei province, People's Republic of China, bordering Shandong to the southeast.  At the 2010 census its population was 4,340,373 inhabitants whom 522,147 lived in the built-up ("or metro") area made of Taocheng urban district.  It is on the Jingjiu Railway.

Xingtai: Xingtai () is a prefecture-level city in southern Hebei province, People's Republic of China.  It has a total area of 12486 km2 and administers 2 districts, 2 county-level cities and 15 counties.  At the 2010 census, its population was 7,104,103 inhabitants whom 1,461,809 lived in the built-up ("or metro") area made of 2 urban districts and Xingtai and Nanhe Counties largely being conurbated now.  It borders Shijiazhuang and Hengshui in the north, Handan in the south, and the provinces of Shandong and Shanxi in the east and west respectively.

Jing County, Hebei: Jing County or Jingxian () is a county in Hengshui, Hebei province, People's Republic of China.  It has an area of 1183 km2 and has 500,000 inhabitants.  Its seat is the town of Jingzhou (景州镇).

Erenhot: Erenhot (Mongolian: "Эрээн хот" ; , commonly shortened to Ereen or Erlian) is a county-level city of the Xilin Gol League, in Inner Mongolia Autonomous Region, located in the Gobi Desert along the Sino-Mongolian border, across from the Mongolian town of Zamyn-Üüd.  There are 74,197 inhabitants (2010 census) and the elevation is 966 m .

Supporting paragraphs: Erenhot Hengshui
Answer: Hengshui