New urbanization has become the key means to reform urban-rural dual structural and to transform agricultural producing ways in major grain-producing areas under the new era developing background. This paper, based on 2007 to 2021 provincial panel data of China’s 13 major grain-producing areas, uses entropy to estimate China’s grain security level from perspective of industrial chain, applies new urbanization contents to establish a multiple-dimensional index system that is composed of population, economy, society and space, which is employed to estimate the new urbanization level and to study its impacts on grain security, and applies land scaling operation as mediating variable to study the mechanism of new urbanization and its dimensions on grain security. New urbanization largely boosts grain security in major grain-producing areas, and land scaling operation plays a mediating effect amid new urbanization works on grain security. Dimensional heterogeneity suggests that population urbanization and spatial urbanization play an outstandingly positive role on grain security, during which land scaling operation plays a partial or total mediating effect. This paper presents suggestions on boosting new urbanization, and encouraging land scaling operation, and making appropriate strategy from population, economy, society and spatial urbanization as a long-term approach for the major grain-producing areas.

Yangtze River Economic Belt is the most active and economically most dense stream belt in China. China’s fast growing economy and urbanization results in water resources consumption and environmental pollution with an aftermath of low water resources green efficiency in this economic belt. This paper, based on provincial and municipal spatial scales and data of 9 provinces and 2 municipalities in the Yangtze River Economic Belt, uses non expected output ultra-efficiency SBM model to estimate its water resources green efficiency, and establishes a spatial Dubin model to study the impact of water conservancy construction investment on water resources green efficiency. The results show an overall low efficiency, most provinces/municipalities under the effective level. Temporally, the water resources green efficiency shows a fluctuated rising trend, characterized by “downstream>upstream>middle stream”. Spatially, it shows a “eastern high west low and northern high southern low” pattern, most provinces/municipalities in a transiting stage up to the medium green efficiency. Water conservancy construction investment largely improves the water resources green efficiency within the provincial/municipal ranges, with little influence on their neighboring areas. Among control variables, economic development level and industrial structure positively exert boost the water resources green efficiency, but urbanization level, water resources abundance and pollution play adversely, and knowledge level has no significant effect on the green efficiency of water resources. To promote the positive impact of water conservancy construction investment on water resources green efficiency in the Yangtze River Economic Belt, this paper presents suggestions for governments on holding of green development concept, combining water resources comprehensive governance with economic development, carry out green efficiency management of water resources in the Yangtze River Economic Belt according to local conditions, and diminishing its provincial variance for a coordinated and sustainable development on society, economy and ecology in the Yangtze River Economic Belt.

This paper, in order to study impacts of coordinated concentration of manufacturing and industrial servicing on green developing efficiency, uses 27 central cities of Yangtze river delta city cluster as a case to study the impacting degree of coordinated concentration of manufacturing and industrial servicing on green developing efficiency by means of GMM model, with factors threshold effects considered. Single industrial concentration of manufacturing and industrial servicing promotes green developing efficiency, and coordinated concentration does more. Among the controlling variables, economic development, industrial structure, human capital, infrastructure, environmental regulation, foreign capital use and urbanization impact green developing efficiency in a variable way at different concentrating statuses. Under coordinated concentration, human capital and foreign capital use with threshold effects promote green developing efficiency more if over the threshold effects. This paper presents constructive suggestions for Yangtze river delta city cluster on green developing efficiency.

Green development is popular in protecting the Yangtze river, which is backed by synergy innovation. This paper selects panel data of 11 provinces along Yangtze river economic zone during 2009-2017, and uses compound synergy model and SBM to measure their synergy innovation ability and green development level of the 11 provinces. Results show that, as time goes by, their synergy innovative ability remains little change, but outstanding in geographic distribution, highest in the down-stream. The green development level is rising, not high generally with variance among provinces, relatively higher in Shanghai and Jiangsu in down-stream. Both strongly show a regional difference at the same pace. This paper applies panel Tobit model to study the impacts of government-customer-industry-institute synergy innovation ability on green development and concludes that this synergy innovation can improve green development, as clearly shown from middle- to down-stream, but not from up-stream.