Just pure light... Instructor Han Gi-young is the best!! Why is he the best, you ask?? It's truly unbelievable, but as a complete beginner, I passed ADsP, AICE, and the Big Data Analysis Engineer exam without even opening a textbook or looking at past papers, just by listening to Instructor Han's lectures!!! So I sold all the books I bought on Carrot Market 😆😆 I'm going to use the money to help pay for Instructor Han's next lecture 😊😊😊 (I still can't believe I passed, but it's true... it's amazing...) He's truly... a god. You really need to trust Instructor Han Gi-young! ps. I saw you at Aible School, and it's nice to hear your voice again 😊😊