Prehistoric: Imprisoned in a Side Hall of Yuxu Palace for Half a Year

Who is your protagonist? Yuchen? ? If it's him, then mark it clearly. Looking at the cover introduction at the beginning, I always thought that the protagonist was joking. If I hadn't searched it, the more I looked at it, the more wrong it became. The number of occurrences of Jaeyou's name is far less than that of Yuchen. I'm still confused. Why don't you just indicate in advance in the introduction whether the protagonist is male or female? Is there any cp?

I don't understand, who is the protagonist and what route?