2017年民航机场生产统计公报 (in Chinese). Civil Aviation Administration of China. 2018-03-07. Archived from the original on 2015-08-23. Retrieved 2018-03-15.
cctv.com
陈, 玥 (2024) [02.07 09:10]. "地上有"地下悬河" 地下"城摞城":开封"城摞城"揭秘" [Underground Hanging River’ Underground “City Stacked on City”: Kaifeng “City Stacked on City” Uncovered]. www.cctv.com (in Chinese). 新华社. Retrieved 2024-05-31 – via 国家地理.
china.com.cn
yunhe.china.com.cn
李晨翀, 晨翀 (2019) [2019-10-10 22:01:14]. "【寻访大运河文化带开封篇一】一城宋韵半城水" [The Grand Canal Cultural Belt in Kaifeng: A City of Song Rhythm and Half a City of Water]. yunhe.china.com.cn (in Chinese). 开封网. Retrieved 2024-05-31.
贾兵强, 兵强 (2023) [2023-01-10]. "大运河走向与沿河城市的兴衰" [The Direction of the Grand Canal and the Rise and Fall of Cities Along the River]. 5g.dahe.cn. 大河网. Retrieved 2024-05-31.