Researchers in China studied ways to increase crop yields and efficiency in rice-wheat rotation systems. They used field data and a crop simulation model to analyze potential yield improvements. By optimizing crop varieties, planting dates, and water/nitrogen supply, they found that yield gaps decreased over time. To enhance yield potential and eco-efficiency, they recommend using specific rice and wheat cultivars, adjusting planting dates, and applying lower nitrogen rates than currently used by farmers. Their findings offer practical strategies for improving crop productivity and sustainability in China's rice-wheat rotation systems.