If you want to add annotations, tags, etc. to pictures, text, videos and other content on the web page, recommend you a good tool - Diigo. It also allows you to set up groups and share the notes and marks you make on the web page with others, so although this tool is not yet available in Chinese, many people are exploring and using it, especially some educational institutions take it as a teaching and research tool, screening network content, taking its essence and focus, which greatly improves the efficiency of collaborative work and research