Gao Jianli was melancholy because not only did he not know who he loved, he also didn't know who he really loved.
He is just a sick man, why would God bother him like this?
The Dual Personality King VS The Sick Musician
It is adapted based on the historical facts of Gao Jianli and Qin Shihuang. Any similarity is purely coincidental.
Let me tell you quietly: Gao Jianli and Qin Shihuang are really super cool!