The index finger's "Believe in the Future" that I watched was from Tieba. I’ll just write a little bit for you, except that the page may not be right, but everything else is fine.
Book title: "Selected Index Fingers" (Chinese Library 4)
Year of publication: 2009-7-1
Publisher: People's Literature Publishing House< /p>
Source: Believe in the future by changing the book, Chapter 9, page 161