Professor Yang, I've been searching for years for the perfect learning tool for the Japanese language from the perspective of Chinese speakers. I am so glad that I found your channel. Your instructions are very clear, and I especially enjoy the illustrations and the consistent repeat of the material for reinforcement of learning. I find it so much easier than learning from an English speaker perspective because of the language similarities and shared vocabulary between Chinese and Japanese. Thank you for the work that you've put into the teaching materials.