Answer
Kaifeng does not have a ranking among the Eight Ancient Capitals of China. Rather, the term "Eight Ancient Capitals" refers to a collective designation given to eight prominent cities throughout Chinese history, each of which served as the capital of China at various points in time. These eight cities are: Beijing, Nanjing, Xi'an, Luoyang, Hangzhou, Anyang, Kaifeng, and Zhenjiang.