Hello jhhur! Thank you for taking the time to leave a valuable review. I can confirm that you have taken all the lectures, but can you tell me which part you were disappointed with?🥲 If there is any missing or incorrect content, I will try to supplement or revise the lecture content to make it a helpful lecture! Or, if there was a big difference between what you expected from the lecture introduction or introduction video and the actual content of the lecture, I will provide more detailed information on that part so that others can consider this lecture more accurately and narrow the gap between what they expected and the actual content. I am sorry that I could not satisfy you with this lecture😭😭 If you have time, please let me know what was inconvenient and I will try my best to reflect it. Have a nice weekend!