He Passed the Imperial Examination but Relied on Ghosts to Get the Position

Shen Yan didn't understand why the dignitaries in the south of the Yangtze River were copied when the emperor said "the sky is clear". Why was he exiled just by saying "the four treasures of the study room"? He also didn't understand why the eldest princess, who had passed away for many years, was entangled with him. Why was he assassinated before being rewarded for his meritorious deeds? Above the temple, the waves are treacherous and the clouds are treacherous. Who will die and who will live? The road ahead is complicated. Note: Mainly based on dark tactics, not very enjoyable, no CP. The amount of information is huge, the plot is mind-blowing, the plot is real, and the story is simple and innocent. There may be some flaws in the details, please show mercy.