When I first listened to Mr. Baek Gi-seon's lecture, the content was difficult and I couldn't adapt to it, but after gaining some practical experience and studying while developing, I realized that there are so many things to take away from it that I wondered if there could be such a good lecture. I learned a lot from Mr. Baek Gi-seon's lecture and I will diligently take the upcoming series to become a good developer. Thank you for always creating good lectures.