Here is interesting Chinese stuff that I find over time.

1. https://www.youtube.com/@MandarinBlueprint - the content itself is standard, but he often goes on short tangets that are incredibly useful. Those short tangents he rambles are more insightful than the main topic of video.
2. https://github.com/krmanik/HSK-3.0 - All HSK (proficiency test) official content into neat github
3. https://finance.sina.com.cn/ - Main finance news. I really like the Android app
4. https://chinaxiv.org