This course is part of Module II: Technology and Practice on Grain Postharvest Loss Reduction within the webinar series on postharvest loss reduction organized by the WFP Centre of Excellence for Rural Transformation (WFP China COE). The series was held from August 27th to September 26th, 2024, with support from the Academy of China’s National Food and Strategic Reserves Administration (NAFRA).

The overall objective of this webinar series is to share China’s extensive experience, technologies, and practices in reducing postharvest loss. Across two modules—Module I: Experience on Grain Postharvest Management and Module II: Technology and Practice on Grain Postharvest Loss Reduction—a total of 16 Chinese presenters introduced China’s approaches to postharvest management and demonstrated key technologies applied by aggregators at various stages of the postharvest process.

Within this framework, the present course offers a focused overview of key technologies in China’s grain circulation, including impurity removal, grading, and sorting. It highlights the importance of these processes for ensuring grain quality and safety and reviews the evolution of cleaning equipment and the principles of grain storage. The course also examines sorting technologies—particularly colour sorting—which have significantly enhanced grain processing and safety. It provides a clear understanding of how these technologies contribute to efficient grain management in China.