In 1899 AD, on the eve of the Eight-Power Allied Forces' invasion of China, the country's mountains and rivers were shattered and the country's fate was in jeopardy. On the eve of the Eight-Power Allied Forces' invasion of China, Shen Yunzhang, the official of the Imperial College, received an anonymous letter. Attached to the letter were ten blue brick rubbings. The rubbings showed the construction inscriptions of various passes on the Great Wall. The sender called himself "Shi Sou" and left a request in the letter: "Sir, please travel through the mountains and rivers of China and find those forgotten words." Shen Yunzhang embarked on a five-volume journey to find his roots - from the Great Wall pass to the thousand-year-old ancient road , from the source of the river to the ancient city walls, and then to the mountains of the Chinese Dragon Vein, he walked with his granddaughter Shen Qinghe and the surveyor Gu Huaijin who had returned from overseas. In the critical situation of the approaching war, he fought against forgetfulness with his pen and ink and footsteps, and used words to write a biography of the mountains and rivers of China. Every brick and stone, every pass, every ancient city, every section of ancient road, and every mountain range contains thousands of years of joys and sorrows. This is not only the writing process of a mountain and river note, but also an epic of a nation rediscovering its spiritual foundation at the time of survival.
