Table 1.

Composition of cities in different groups.

Comprehensive Network	I	Chengdu	III	Luzhou, Yibin, Zigong, Neijiang
	II	Meishan, Ziyang, Deyang、 Mianyang, Leshan,Ya ’an	IV	Guang'an, Nanchong, Suining, Dazhou, Chongqing
Economy Network	I	Chengdu, Meishan, Ziyang, Leshan, Ya ’an	III	Luzhou, Yibin, Zigong, Neijiang
	II	Mianyang, Deyang	IV	Guang'an, Nanchong, Suining, Dazhou, Chongqing
Information Network	I	Chengdu	III	Luzhou, Yibin, Zigong, Neijiang
	II	Suining, Dazhou, Nanchong, Guang ’an	IV	Leshan, Meishan, Deyang, Mianyang, Ya ‘an, Ziyang, Chongqing
Innovation Network	I	Chengdu, Meishan	III	Neijiang, Mianyang, Ya ’an、Yibin, Ziyang, Chongqing, Guang'an
	II	Luzhou, Deyang, Dazhou, Zigong, Leshan	IV	Nanchong, Suining
population network	I	Chengdu	III	Luzhou, Zigong
	II	Meishan, Neijiang, Deyang, Mianyang, Suining, Ziyang, Leshan, Nanchong, Chongqing, Ya ’an	IV	Dazhou, Yibin, Guang'an