Which of the following cities hosts a population of 783,478: Xinzheng or Jiaozhou City?
Xinzheng: Xinzheng () is a small county-level city of Zhengzhou in the south of Henan province of Central China. Jiaozhou City:  It has an area of 1,313 km and a population at the 2000 Census of 783,478.
i don't know