Fig. 3: Network and timing analysis based on published literature.

Articles published on the Web of Science in the past five years were retrieved and results were visualized through bibliometric methods by VOSviewer and CiteSpace. “Gastric cancer” and “Liquid biopsy” are set as keywords to draw the network and time series diagrams to analyze the development trends in this field. Each node represents different research content. The size of each node indicates the frequency of occurrence, the thickness of the connection between the nodes indicates the strength of the association, and the different color represent the temporal characteristics of the nodes.