The book collects 36 open letters. The title of each letter begins with the word ""Big"", so the book is called 36 ""Big"". There are letters to the mere nephew, the junior fellow apprentice, the post-90s, Han Han and young people who love culture and arts. The book also has letters to Si Maqian, Maradona, Tang Xuanzang and Liang Sicheng. There are also portfolios to writer themselves.