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From 2022 to 2023，driven by multiple factors such as internet technology，the nationwide large-scale infections，and comprehensive liberalization，as well as the frequent introduction of policies related to internet healthcare，the entire internet healthcare industry has further developed vigorously. The comprehensive development of various models of internet healthcare has also driven further applications in the field of medical and health big data，particularly in clinical diagnosis，drug research and development，and big health. In the new environment，the development of internet healthcare should comply with market development and formulate clear development strategies based on its own characteristics.

On the one hand，with the outbreak of the epidemic and the smooth recovery of the first stage，the development of the internet medical field has deeply rooted in people’s hearts，forming a relatively stable development model and user usage habits. During and after the epidemic，the government has also introduced multiple policies to encourage the development of online healthcare，which involves sensitive areas such as medical insurance settlement for online followup treatment and prescription circulation. Internet healthcare is facing new development opportunities. On the other hand，on the basis of drawing on international experience and closely combining with the actual situation in China，Internet healthcare rapidly applies high-tech such as big data and artificial intelligence to assist its development，and focuses on the development model of Internet hospitals. Internet hospitals have become the digital infrastructure of the healthcare industry in the digital economy era.

On the basis of such development，the “China Internet Medical Development Report（2022-2023）” continues to focus on the field of medical and health big data，focusing on the application models and scenarios of Internet medical and medical and health big data，especially in the fields of drug research and development，elderly care，clinical treatment，grassroots medical care，public health，etc.，and explores the development of Internet diag-nosis and treatment，providing important decision-making references for regulatory departments and industry associations related to Internet medical，provide literature materials on internet medicine and medical health big data for practitioners and institutions in the medical and health field，and provide readers interested in internet medicine and medical health big data with the development status of this field in the past years. This provides beneficial support for the healthy and orderly development of internet medicine and medical health big data in China.

Keywords：Internet Healthcare；Medical and Health Big Data；Public Health