Campus youth is always so fleeting, looking back in the future is already a reality. Is the dream I remember in my heart now, or is it a phantom in the end? Looking at countless civilizations, they are all short-lived. Knowing that no one can have eternal life. Rolling red dust makes people still If you are infatuated, why should you yearn for the ethereal truth? Why is this book called about observation? Maybe you will have a deep understanding after reading it. Here is a reminder, please do not confuse the content in the book with the real world, there is an insurmountable gap between the two.