As new urbanization rapidly advances, a variety of urban issues begin to emerge, which makes urbanization quality a key point for regional development, marked by a coordination among basic public services, population urbanization and eco-environment. This paper, based on a case study in Hexi area, Gansu province, uses entropy, coupling coordination model to measure comprehensive developing level and coordination of basic public services, population urbanization and eco-environment from 2011 to 2021, and applies obstacle model to study the factors impacting their coupling coordination in Hexi area. Hexi’s sub-systems show a rising trend, and vary with areas. Population urbanization is the fastest and the basic public service is the lowest in increment. Coupling degree of Hexi’s ternary system is larger than 0.900, suggesting a strong interaction and a slowly-rising coupling coordination from low level to medium level. Spatially, coupling coordination from high to low is in the order of Jiayuguan, Jinchang, Zhangye, Jiuquan and Wuwei. In the dual system, coordination is the highest in basic public service-eco-environment which promotes a regional development, lowest in basic public service-population urbanization against a regional development. Obstacle factors of ternary system coordination in Hexi’s five cities vary; the top three are social security and employment, urban infrastructure and health care within the basic public services. The ternary system coordination among basic public services, population urbanization and eco-environment promotes Hexi’s regional economy, but the three are still constraints. This paper presents suggestions on optimizing cities’ positioning, fulfilling resources advantages, boosting infrastructure, intensifying agriculture, developing featured industries and green industries to promote a quality coordinated development in Hexi area.

According to the complex network theory, this paper establishes a complex network model of lithium carbonate global trading, uses lithium carbonate global trading data of UNcomtrade database 20052014 to calculate the degree, weighted degree, clustering coefficient, and modularity, trading group model degree & group change of China’s lithium carbonate in global trading network, with results showing rising trading partners, ranking No.2 in holding international trading relation numbers, which diversifies import and export. China keeps a close and stable relation with partners. Among the entire complex international trading network of lithium carbonate, China has a higher control rights but a descending controlling ability.

This paper, based on on site investigation, studies their sustainable development and industrial upgrade in Sichuan’s mature resource based cities, establishes an evaluation index system from resources, economy, society and eco environment, including 4 level1 and 8 level2 indexes, which are given weights through Delphi. Among Sichuan’s 9 mature resource based cities, Panzhihua is in sustainable development, Zigong, Guangyuan and Guang’an are in moderately sustainable development, Mianzhu, Liangshan, Dazhou, Xingwen and Ya’an are in initially sustainable development. This paper presents suggestions and paths for upgrading industrial transformation.

Air PM_2.5and PM₁₀ samples that were concurrently collected during March 5-14, 2008 were analyzed in their pollution level, daily changing trend, the ratios of PM_2.5/PM₁₀, and influent factors with results indicating that the daily average concentration of PM₁₀ was 220.0 μg/m³, 46.7% more than the second national standard (150 μg/m³), and that the daily average concentration of PM_2.5 was 132.5 μg/m³, 103.8% more than the US’s standard. This reveals a severe atmospheric particle pollution in this area. PM_2.5 which is more harmful to human is a major component of PM₁₀, about 63.6% on average. PM_2.5 and PM₁₀ concentration has a good correlation with humidity and wind velocity, increasing with the increasing of humidity and the temperature, and decreasing with the increasing of wind velocity. The meteorological conditions plays a key role in atmospheric particle pollution. This paper presents a reference to prevent air particulate pollution and to make policies.