Hello, byeong! This is the instructor :D First of all, I would like to express my sincere gratitude for taking the course <Next.js Master Class: Part 3 - Completing Practical Architecture (Server-Client Synchronization, Extreme Optimization, Full-Stack Security)> and leaving such a valuable record. Even without a separate comment, receiving such a positive rating makes the effort of preparing this course feel truly rewarding. I sincerely hope that the practical architecture building, optimization, and security principles you learned through this course will be of practical help in strengthening your solid development skills. I will be rooting for your continued growth and enjoyment in your future learning journey. To repay the trust you've shown in your learning, I would like to offer a small benefit. If there are any additional courses you wish to take among our curriculum, please feel free to contact us at our inquiry email, jeony0535@naver.com. I will send you a discount coupon immediately upon confirmation. Thank you once again for your precious time and kind heart. I sincerely support your growth! :D