I'm Not the First Assistant

Hello, is there any prototype of Li Chen in the book? Please let me know which history book I refer to, thank you.

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Isn't the protagonist the same loser? I feel like I can really make a couple with Chongzhen! I don't think the protagonist can be reborn! The protagonist, a time traveler who knows history, has such a miserable life. It feels like the protagonist traveled through time and was reborn in Chongzhen.