Table:
text: List of cities in China by population
List of major cities by population
Urban population
City_2010_census Chinese Built_up_Area Urban_Area Level_ Administrative_Area Province_level_division Remarks_
Zhengzhou 郑州 4867388 4253627 Prefecture-level city , Provincial capital 8626505 Henan Incl. 6 urban districts plus Xingyang city.
Jinan 济南 4335900 4335900 Sub-provincial city , Provincial capital 6813800 Shandong 
Nanchang 南昌 4107962 2357838 Prefecture-level city , Provincial capital 5042565 Jiangxi Incl. Nanchang County being urbanized but not Wanli urban District, not yet in built-up area.
Changsha 长沙 4073645 3093980 Prefecture-level city , Provincial capital 7044118 Hunan Incl. 5 urban districts plus Changsha County being urbanized.
Taiyuan 太原 4062173 3426522 Prefecture-level city , Provincial capital 4201591 Shanxi Incl. Yuci and Qu urban districts in Jinzhong.
Shijiazhuang 石家庄 3995290 2861784 Prefecture-level city , Provincial capital 10163788 Hebei Incl. Luquan City, Zhengding and Luancheng Counties being urbanized.

Question: How many people live in the built-up area of Zhengzhou in the list of cities in China by population?