The biography of Zhang Ruoxu, the author of "Spring River with Flowers and Moonlight Night", deeply restores the legendary life of the poet in the Tang Dynasty on a scale of 100,000 words. The work starts from the youthful days in the mist and rain of Yangzhou, detailing the hardships of the scientific research in Chang'an and the military training in Yanzhou, until that night on the Spring River that created an eternal masterpiece. By exploring how he integrated the poetic styles of the north and the south, he finally showed the atmosphere and vitality of the Tang civilization in a single piece of life history that spans the ages. This book combines historical research and literary imagination, not only restores the context of the times, but also penetrates into the poet's mind and reveals the mystery of the birth of the classic.