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

Table 2

Classification of foreign contact intensity.

Grade	City	Connectedness value
1	Luohe, Kaifeng, Huainan, Bozhou	−47.69 to 291.45
2	Fuyang	−74.07 to −47.69
3	Jining, Lianyungang, Xinyang, Yangzhou, Suzhou	−90.80 to −74.07
4	RiZhao, Heze, Zaozhuang, Zhoukou, Liuan, Zhumadian, Linyi, Shangqiu, Pingdingshan, Xuzhou, Huaiyin, Suqian Xuchang, Huaibei, Yancheng, Suzhou, Yangzhou, Xinyang	−154.36 to −90.80
5	Bengbu	−154.36