Fig. 12: Chronological mapping of ICH digitalization studies in CNKI (2006–2024).

This figure visualizes the temporal distribution and clustering of keywords in CNKI-indexed literature on ICH digitalization from 2006 to 2024. Key thematic clusters include “Digitalization,” “Protection,” “Inheritance,” and “Big Data.” The color gradient indicates the time of emergence, with warmer colors (e.g., yellow) representing more recent years. Node size reflects frequency, and links represent co-occurrence relationships among terms.