“Reporting on the latest advancements in gastric cancer screening, China is making strides with the development of a high-quality screening system tailored to its national conditions. Gastric oral contrast ultrasonography (OCUS) emerges as a promising, non-invasive screening tool, offering a painless and radiation-free alternative. Expert consensus has been formed on OCUS as a preliminary screening technique, aiming to standardize its popularization. This research lays the foundation for the construction of a preliminary gastric cancer ultrasound screening system that aligns with China's national conditions.”