Kim Joo-yeon! First of all, thank you for your valuable course review. You have accurately pointed out the main points of my lecture. For things like UI and design tools, you can use well-made packages, and the most important thing is to think about how to make the maintenance that will continue after the service distribution easy and simple. I think Kim Joo-yeon will do well!! The lecture may be lacking, but I hope it will be of some help to your work or studies :) Thank you!!