The upload size of the Douyin business license must be no less than 800 pixels in width, no less than 600 pixels in height, and no more than 5MB in file size. It is recommended to use clear, high-quality images to ensure that the uploaded license information can be clearly and accurately displayed on the Douyin platform to avoid failure to pass the review due to small size or blur. At the same time, you should also pay attention to protecting personal privacy information and avoid leaving sensitive personal information on the license.