Competition in the legal services industry is increasingly fierce. A lawyer's professional competence is reflected not only in their familiarity with legal provisions, but also in their ability to clearly and efficiently convey complex case facts and logical relationships to judges, clients, and colleagues. In legal practice, the most commonly used visualizations include case timelines, legal relationship diagrams, case flowcharts, and equity structure diagrams. These four types of charts cover the entire case-handling chain, from fact-finding to legal analysis, and from procedural progression to business structure.