“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. This document, based on two 2020 OCUS consensuses, analyzes national gastric cancer screening strategies and challenges, detailing the key aspects of OCUS, including indications, contraindications, operator requirements, contrast agent standards, and essential scanning protocols. It introduces the standardized ultrasound sections and the Stomach Ultrasound Report and Data System (Su-RADS), proposing relevant consensus opinions. After several rounds of discussions and voting by experts from multiple societies, a total of 17 consensus opinions have been formed on OCUS as a preliminary screening technique for gastric cancer, aiming to standardize the popularization of OCUS. The consensus also calls for conducting nationwide multicenter prospective studies to improve the level of evidence and provide big data support for the construction of a preliminary gastric cancer ultrasound screening system that is in line with China's national conditions.”