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Despite city authorities in Bangladesh being concerned about urban sustainability, they often face difficulties in addressing predominant urban challenges threatening urban sustainability, due to limited relevant literature. To reduce this gap, this study aims to address the predominant urban challenges and assess their severity levels in four city corporations of Bangladesh, e.g. Rajshahi, Sylhet, Barishal, and Gazipur.

Using a mixed-method approach, this study rigorously analyzed field-level data obtained from 1,200 residents across selected cities using diverse statistical techniques. The quantitative analysis included descriptive analysis, exploratory factor analysis, and chi-square tests, whereas qualitative insights were derived through thematic analysis.

The study uncovered nine predominant urban challenges under two crucial factors “Feeble Urban Management” and “Illicit Activities” that collectively explain 62.20% variance. “Feeble Urban Management” explains 44.17% variance, whereas “Illicit Activities” accounts for 18.13%. Within these challenges, uncontrolled urban sprawl, inadequate disaster management, congested roads, and shabby drainage and waste management pose significant threats to urban sustainability. Illicit activities, manifested by encroachment on water sources, grabbing roadside, destruction of natural properties, and activities undermining social security, compound the urban sustainability issue. Severity analysis reveals Sylhet (54.5%), Rajshahi (46.4%), and Barishal (31.2%) as highly impacted, whereas Gazipur exhibits moderate severity (66.7%).

The findings of this study reveal intrinsic insights into urban challenges in Bangladesh that will provide valuable guidance to city authorities, equipping them to implement integrated and effective initiatives and programs that overcome these predominant urban challenges, with a specific focus on Rajshahi, Sylhet, and Barishal city corporations.

As the China–US trade tensions escalate, the implementation of US sanctions has imposed severe restrictions on the innovation resources of Chinese firms. This study introduces the theory of peer effect to investigate whether US sanctions stimulate a homogenization of innovation strategies among Chinese companies in the same industry, thereby giving rise to an innovation peer effect.

This study utilizes a sample of 4,078 A-share listed companies from 2015 to 2021 and employs a multi-period difference-in-differences (DID) model for analysis.

The findings indicate that US sanctions significantly stimulate innovation inputs among companies in the same industry, but concurrently, they suppress innovation outputs. Moreover, a higher degree of internationalization weakens the promotion of innovation inputs by US sanctions and amplifies the inhibitory effect on innovation outputs. A high proportion of long-term loans offsets the negative impact on innovation outputs, whereas a high proportion of short-term loans diminishes the positive impact on innovation inputs.

This study elucidates how external shocks impact companies’ innovation capabilities within the same industry, offering a fresh perspective on understanding the influence of China–US trade tensions on innovation among Chinese firms.

Chinese firms should view US sanctions-induced technological challenges as opportunities, fostering breakthrough innovations through industry-academia collaboration. Balancing risk and reward is also key when navigating technological innovation and global strategies.

This study comprehensively reflects the impact of the US sanctions on Chinese firm innovation. It lays the foundation for analyzing the transmission mechanism of other trade policies under the framework of trade friction theory.