[Spatial Network Characteristics and Convergence of Technological Innovation Efficiency of Carbon Neutrality in the Yellow River Basin].

convergence analysis to explain its spatial convergence rule. The results showed that the carbon neutral technology innovation efficiency in the Yellow River Basin presented a pattern of "lower reaches > middle reaches > upper reaches"， with local dynamic characteristics and unbalanced characteristics co-existing. The network density of carbon neutral technology innovation efficiency in the Yellow River Basin gradually decreased from upstream to downstream and then to the middle reaches. The coastal cities in the lower reaches of the Yellow River Basin developed rapidly under the spillover effect of other plates. Zhengzhou， Jinan， and Heze have become important central cities to radiate and drive the development of the surrounding areas. The spatial convergence analysis showed that the convergence characteristics and catch-up effect of carbon neutral technological innovation efficiency in cities in the Yellow River Basin were significant， and the convergence speed was the fastest in the downstream area.