[Objective] This paper studies the annotation method for Chinese electronic medical records, aiming to improve the processing of massive clinical texts and clinical knowledge discovery. [Methods] First, we proposed annotation method for Chinese e-medical records, and constructed a visual interactive platform. Then, based on the word and phrase features of these records, we identified the medical name entities with natural language processing and machine learning approaches. [Results] A total of 700 annotated records were obtained, and the overall F value of the Pipeline-based annotation method reached 0.8772, which was 32.9% higher than those based on the original medical records. [Limitations] Since the electronic medical record contains sensitive privacy information, this study was conducted with open dataset, and the corpus size was limited. [Conclusions] The Chinese electronic medical record annotation method and platform constructed in this study could effectively process clinical texts, and the association of medical knowledge.
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