{"cik":1758530,"taxonomy":"us-gaap","tag":"CommonStockSharesOutstanding","label":"Common Stock, Shares, Outstanding","description":"Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.","entityName":"So-Young International Inc.","units":{"shares":[{"end":"2020-12-31","val":70212159,"accn":"0001104659-21-058062","fy":2020,"fp":"FY","form":"20-F","filed":"2021-04-30","frame":"CY2020Q4I"}]}}