There was a refreshing feeling of rubbing the itchy spot that my hands couldn't reach with my filial hands. It was hard to organize until the end, but more than anything, I feel like I have a foundation to stand on. Every single word that penetrated the core really left a deep impression on me. It was really helpful for me to grasp the concept. I couldn't help but admire how much skill you have and how you could speak so concisely and without redundancy. Next, I will try ES6. Thank you so much for the great lecture.