Hong Kong researchers have revealed the importance of stakeholder collaboration in enhancing household waste sorting practices in Chinese cities. By linking policy with grassroots participation, the study supports a more effective waste governance in alignment with China’s growing national emphasis on packaging recycling. The study, published in Environment, Development and Sustainability, focuses on Changsha, a “new first-tier” city in Hunan province, and offers a practical framework for waste management reform grounded in collaborative governance.