Lin Yan, a lover of modern science and engineering and history, accidentally traveled to the tenth year of the Yuan Dynasty from Emperor Shizu of the Yuan Dynasty to the Yuan Dynasty. Not long after the fall of the Southern Song Dynasty, he was the concubine of a small landlord's family. The family was on the verge of bankruptcy due to war and plunder by the Mongolian nobles. His mother is Han Chinese and his father is a Semu businessman. Due to his mixed status, he found himself in an awkward position in the Yuan Dynasty's "four-class system". This became his initial dilemma but also provided him with a unique perspective and a possible path for advancement.
