Research Article

Study of Urban System Spatial Interaction Based on Microblog Data: A Case of Huaihe River Basin, China

Table 4

Classification of outflow rating.

GradeCityOutflow rating

1Yangzhou80,001–102,087
2Xinyang, Bozhou, Jining, Lianyungang50,001–80,000
3Luohe, Kaifeng, Fuyang, Linyi, Huaiyin30,001–50,000
4Pingdingshan, Xuchang, Zhoukou, Zhumadian, Shangqiu, Heze, Suzhou, Xuzhou, Zaozhuang, Suqian, Huainan, Bengbu, Luan, Yancheng10,001–30,000
5Huaibei, Rizhao10,000