What does the Central Plains really mean when introducing Chu Ci?

In a broad sense, the Central Plains is centered on the seven ancient capital groups of the Central Plains (Luoyang, Kaifeng, Shangqiu, Anyang, Zhengzhou, Nanyang and Xuchang) and radiates the vast plain areas in the middle and lower reaches of the Yellow River, that is, Henan is the main body, including the vast areas around Henan. The narrow sense of the Central Plains refers to the middle of heaven and earth, the middle of Henan.