1. First, enter the backstage of official website Mu Ying live broadcast from the browser, and there will be a created live broadcast room in the backstage of official website. Select the live room where the document needs to be uploaded, and click to enter the live room.

2. Click the function settings on the left to open the open button of the document module in the function settings, click Add Document, and select the local document to upload.

3. When uploading the document, you can click on the student table to comment.