Network structure of the urban agglomeration in the middle reaches of the Yangtze river 并列题名：Network structure of the urban agglomeration in the middle reaches of the Yangtze river Research on urban agglomeration in the Middle reaches of Yangtze River Study on the integrated development model and mechanism of urban agglomeration in the middle reaches of the Yangtze River Network structure of urban agglomeration from the perspective of flow space Strategic environmental assessment of urban agglomeration development in the middle and lower reaches of the Yangtze river Interviews on ecological management in the middle reaches of the Yellow river nuo culture of the upper and middle reaches of Yellow River bronze civilization in the middle reaches of the Yangtze large tomb of a Chu noble in the middle reaches of the Yangtze