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Primary high-energy cosmic rays induce extensive air showers in the Earth's atmosphere, with the fluxes of neutrons, muons and other secondary cosmic ray particles showing significant anomalies during the seismogenic and pre-earthquake stages of strong earthquakes. Existing studies have verified a distinct statistical correlation between ground-observed cosmic ray intensity anomalies and strong earthquakes, and relevant theoretical hypotheses on cosmic ray intensity variations triggering strong earthquakes have been proposed. Establishing a quantitative relationship between them based on current research is expected to develop a new earthquake early warning method. This paper systematically sorts out the research achievements on the cosmic ray-earthquake precursor correlation, and analyzes the earthquake-related observational data from the thermal neutron detector at Xizang University, providing a reference for the study of earthquake precursors by using cosmic ray observational data from the Qinghai-Tibet Plateau.