The regional differences in the Yellow River Basin have increased, and the aggravation of this unbalanced state has seriously restricted the high-quality development of the Yellow River Basin during the accelerated urbanisation that has taken place in recent years. In this regard, heterogeneity in the trends of evolution and the causes of population shrinkage in different regions of the Yellow River Basin can be adopted as targeted countermeasures. The present study uses data from the fifth, sixth, and seventh national censuses and takes the administrative units of different levels in the Yellow River Basin as the object, considering 72 prefecture-level cities within the autonomous prefectures and 595 county-level administrative units in nine provinces (autonomous regions). The population shrinkage coefficient, night light index, bivariate spatial autocorrelation, geographic detectors, and other methods were used, with the final objective of exploring the spatial–temporal distribution pattern and impact mechanism of urban shrinkage from 2000 to 2020. The results of the study show the following: (1) The shrinkage patterns in 2000–2010 (T1) and 2010–2020 (T2) were quite different. From T1 to T2, the shrinkage situation worsened, with the number of districts experiencing population shrinkage increasing from 175 to 373 and the number of districts experiencing continuous night light and shrinkage districts increasing from 146 to 163. (2) The phenomenon of urban shrinkage is spatially scale dependent, with the shrinkage of prefecture-level cities and county-level cities being characterised by both spatial differentiation and spatial nesting relationships. (3) There is a certain inconsistency in the representation of the shrinkage patterns of the nighttime lighting and population data. The nighttime lighting dimension can reflect the structural shrinkage characteristics of the city more accurately and sensitively, and the representation of population loss is lagging. (4) The main impact factors and the intensity of urban shrinkage are the aggravated aging level, the declining level of industrial greening and intensification under market-driven economic structure adjustments, and the decreased natural growth rate in the population structure and public service facilities.

Chinese rural elderly care services face challenges such as low levels of pensions and social security, as well as high proportions of the elderly living alone and those who are incapacitated and lack assistance. The rural elderly surrounding megacities have been more significantly impacted by urbanization (with relatives moving away to the megacities for jobs) than in other areas, so the well-being of this particular group deserves even more attention. However, existing major studies in China are mainly limited to those in need in specific regions, and there is little research on the well-being of special age groups. To fill the research gap, this study constructs an indicator system for the well-being assessment with five dimensions and explores the well-being of the rural elderly surrounding Xi’an and its obstacles using questionnaire data. The results indicate that (1) the well-being index of the rural elderly surrounding Xi’an in each dimension, in descending order, are medical health, spiritual fulfillment (the pursuit of the spiritual world of the elderly and their desire for a better life), quality of life, social relationships, and economic income status; (2) the comprehensive well-being of the rural elderly varies considerably in the northern counties and districts of Xi’an, and is relatively low in the south; and (3) spiritual fulfillment and medical health are the main obstacles to the improvement of well-being of the rural elderly surrounding Xi’an. Based on these findings, corresponding policy implications are proposed on the five dimensions of well-being, such as improving the rural social old-age insurance and medical insurance systems, providing old-age support for the families of the rural elderly, establishing a model of village old-age care, and promoting the rural habitation renovation, to provide guarantees for the improvement of the well-being of the rural elderly surrounding megacities.

As an important driving force for economic development and social progress, women have become an important subject of well-being research. Human well-being is the state of physical and mental health as well as material affluence and includes a variety of factors, such as wealth, education, health, safety, amenities, way of life, and happiness. Based on the established research framework of the Women’s Development Index (WDI) in Northwest China, this paper first measured the objective well-being level of women in Shaanxi, Gansu, Qinghai, Ningxia, and Xinjiang from 2003 to 2020 under the influence of ecological factors. In addition, spatial disaggregation and comparative analyses of the spatial imbalance of women’s well-being in Northwest China were carried out using the Theil index and Dagum Gini coefficient. The results show that (1) the WDI in ecologically vulnerable areas in Northwest China increased from 0.525 in 2003 to 0.690 in 2020, indicating an overall increase in well-being. (2) The WDI in the five provinces gradually increased with fluctuations. Among them, Shaanxi always remained in first place in terms of the WDI. (3) From 2003 to 2020, the spatial imbalance of women’s well-being as measured according to the WDI in Northwest China first increased and then decreased. However, the gap in women’s well-being in Northwest China was smaller than the economic gap. (4) From 2003 to 2020, the well-being gap measured by the WDI among the 10 groups of provinces in Northwest China gradually decreased, and the development gap between the provinces and Shaanxi was the largest.