When science graduate students travel through the Southern Song Dynasty with modern knowledge, the lingering pain of the humiliation of Jingkang still lingers, and the scars of broken rivers and mountains are glaring. As a descendant of King Cao Wuhui, the famous founding general of the Northern Song Dynasty, he looked at the portrait of his ancestor, and his blood surged in his chest - how could the Northern Expedition and the restoration of the land be left in the history books only as a lament?
Hanyuan cannot lock Ling Yunzhi, and he knows well the principle of "building a family first and strengthening the country". Relying on knowledge and calculations that transcended the times, he made progress step by step: he might offer suggestions to organize the army, or use mathematical knowledge to optimize ordnance. Or plan food and grass, and use the wisdom of managing the world to improve people's livelihood. Revitalizing the Cao family is not the ultimate goal, but the foundation to support the Northern Expedition. Just as his ancestor Cao Bin pacified the south of the Yangtze River, he would use modern wisdom as his blade and his family's glory as his armor to embark on an iron-blooded road to restore peace and stability in the turbulent Southern Song Dynasty. This journey to save the country across time and space is quietly starting from a dilapidated courtyard.
