Water Margin: Travel Through Zhaogou and Guard the Northern Border

[The real heroes conquered the world, punched the Khitan in Beihai, kicked Xixia Party items, and recreated the prosperous age of the Tang Dynasty] College student Zhao Jiu accidentally traveled through time and became the ninth son of Emperor Zhao Ji of the Northern Song Dynasty. At this time, he was only seven years old. He had no military power and did not know that he would be the founding emperor of the Southern Song Dynasty. All he knew was that in the near future the Jin people would go south and the Second Saints would hunt north. I don't know how Zhao Jiu, a college student with almost no historical knowledge, will collide with this era of collapse in the near future.