A course that is not even worth 1 star First, I doubt whether the lecturer understands deep learning and teaches it. I think there are people who have sufficient knowledge but poor communication skills, and on the contrary, there are people who do not have sufficient knowledge but have good communication skills and make good lectures. However, the person who taught this course had no communication skills and seemed to have very low related knowledge. I also think that he was not prepared for the class. 1. No understanding of why relu is used and back propagation 2. As a programmer, when explaining other people's code, no awareness of copyright 3. Just reading the code to explain the example, without knowing what the problem is or what it is to solve 4. I wonder why the title is Keras Lecture 5. Excessive explanation only for parts that anyone can understand 6. When explaining the model, refer to the wiki and Keras documentation, and roughly skip over them for those who are curious 7. All theoretical explanations are just a guess 8. Etc. Still, "Extension" and "Diagnosis" made me laugh out loud.