Leaving a review after finishing. Honestly, I didn't know there was such an instructor in Korea. I worked as a frontend developer for quite some time and came back to backend, and I believe most courses focus on clone coding and understanding concepts. However, Mr. Kim Young-han's lectures accurately grasp why we need to learn this, and every time I look at the materials, I think he is arguably the best online instructor in Korea. I've watched many lectures, but this is the first time I've felt a lecture so sincere and genuinely caring for all of us. I have purchased all of Mr. Kim Young-han's lectures, but I'm still only on Java Intermediate 1. I truly hope to complete them all and see the day I shine in the field.