In 2020, PeiJu wanted to write to Master Thoreau to ask him some thoughts and philosophies about his writings. After the changes in time from the nineteenth century to the present twenty-first century, there are many ideas that could have been imagined in Thoreau's time, but today in the twenty-first century, there have been changes, so PeiJu has been brewing to ask Thoreau some questions. PeiJu often, secretly guessing, sometimes asking and answering himself, but after the advent of ChatGPT, ChatGPT was able to incarnate Thoreau's thoughts and tone to answer PeiJu's questions, which made PeiJu very excited. This is the source of this book, and it is also the question that PeiJu has always wanted to write to Thoreau, and when it is finally answered, PeiJu records it.