OK - I think I know where it is coming from. Here it is:
https://www.rocketlanguages.com/chinese/
Each of the tabs to the right contain pages of material that is worth going through. Perhaps a lot (maybe all) is covered by the regular course.
https://www.rocketlanguages.com/chinese/
Each of the tabs to the right contain pages of material that is worth going through. Perhaps a lot (maybe all) is covered by the regular course.