I used both of them. Onions are basically talking about knowledge points and there will be animation demonstrations. Each video takes a long time and is free. At the beginning of each video, physics masters will use movies and cartoons, and knowledge points will be demonstrated by animations. Each video lasts 3-5 minutes, so it will look easier. The video explaining the exercises in each chapter is charged and the price is not expensive. The key is that the physics master has videos of all the knowledge points of junior high school physics, and onion physics currently has only five chapters. Personally, I think the master of physics will be more systematic and I hope to adopt it.