The rate of urbanization and its implications in post‐Mao China have been underestimated in most recent studies on China’s urbanization as they have excluded the rising urban floating population. Making use of recently available floating population survey data assesses the significance of China’s urban floating population and its socio‐economic consequences and suggests remedial measures to control its flow. Finds that the floating population caused China to experience one of the highest urban population growths among the developing countries. The floating population has increased rural‐urban labour mobility and helped to eliminate the dualistic nature of Chinese society. But it has also caused oveer‐urbanization and environmental pollution and created certain social problems. To control the flow of the urban floating population, argues that the government should increasingly rely on indirect market‐based control mechanisms.

The outbreak of COVID-19 has had an immeasurable impact on the global economy. It has damaged parts of the real economy, but also provided new opportunities for China’s green development. Both the system and foreign direct investment (FDI) have an important impact on China’s green recovery path. Based on the provincial panel data of China from 2007 to 2016, this paper uses a slacks-based measure (SBM) model and Malmquist–Luenberger (ML) index to measure the green total factor productivity (GTFP), and empirically analyzes the regulatory role of system in the influencing mechanism of FDI on GTFP. The results show that the overall level of FDI significantly inhibits the improvement of GTFP, and the interaction between system and FDI makes it shift from inhibition to promotion, but the promotion would be weakened with the improvement of the system. FDI in the eastern region shows a positive effect on GTFP, which will be weakened with the improvement of the system. FDI in central and western regions shows a negative effect on GTFP, and the negative effect in western regions will be increased with the improvement of the system. Then this article puts forward targeted policy suggestions for further improving the level of regional systems and introducing FDI of high quality.

with an average particle size of 90 nm was synthesized by coated silica in solution.As a type of hard template, the coated silica shell layer could decrease the sinter of alumina particles during the phase transition process at 550 C. The average particle size of g-Al 2 O 3 is significantly affected by boehmite concentration, amount of sodium silicate, and layers of silica. The mechanical properties of waterborne acrylic resin were enhanced significantly after the addition of g-Al 2 O 3 nanoparticles with dispersant (SK-5040). For solvent-based polyurethane resin, the surface of g-Al 2 O 3 nanoparticles needed to be modified by stearic acid to achieve proper dispersion and stability. For comparison, the effect of different fillers (including ZnO, TiO 2 and SiO 2 ) was also tested under the same conditions.