· Protagonist: Lin Yan (25 years old, a modern liberal arts champion in his previous life, and a poor scholar of the same name who traveled back to the Tang Xianzong period)
· Special abilities: photographic memory, proficient in Tang poetry and Song lyrics, familiar with historical trends but unaware of specific details
· Emotional line: Forbidden love with Princess Li Zhaoyang (17 years old) of Yongning who visited in private
· Era background: During the Mid-Tang Dynasty, there were fierce party disputes in the court, unstable borders, and undercurrents of social conflicts.
