"Hidden Dragon Record of the Song Dynasty" tells the story of twin brothers Qingyuan and Lingyun who were reincarnated as Hidden Dragon and Xianlong, and guarded Chinese civilization at historical points such as the Jingkang Incident and the Battle of Yashan. The two went from opposition to unity, transformed into a Chaos Dragon to save the survivors of the Song Dynasty, and created the Dragon Sleeping Realm to continue the fire. For seven hundred years, they slept underground, sneaking into the blood of the nation with their spirit, and awakened in critical situations such as the Opium War and the Revolution of 1911 to guide changes. In the end, the two gave up the dragon body and turned into "Tao" itself, integrating into the spiritual genes of every Chinese person, witnessing the rise of modern China, and interpreting the eternal theme of "civilization is immortal and the dragon's veins continue".