Thank you for making a helpful lecture :-) Thanks to you, I think I can handle Spring with more confidence ㅎㅎ The total class time is 12 hours and 7 minutes, and I can vaguely feel how much effort you put into making this time. Thank you again :bow: The link in the PDF lecture material you uploaded is set to 'bear://x-callback-url/open-note?(blah-blah)', so I can't jump to the page with specific content, which is a little inconvenientㅠㅠ I think it's because the bear app doesn't support this part when converting to pdf.. Rather than a wishful thinking, I'm praying a little in the hope that bear will support it someday :pray: