Great Tang: From the Start, I Reveal to Li Jiancheng That I Transmigrated

[Historical, ancient setting, from the start, history, scheming, play the pig to eat the tiger, Tang dynasty, transmigration, multiple heroines, goofy] Chu Yun wakes up to find that he has transmigrated to the Tang dynasty and become a servant in the household of Crown Prince Li Jiancheng. After calculating the date, he realizes the Xuanwu Gate Incident is just one day away. During the incident, the Crown Prince will be defeated, and everyone in his household will be executed. He's barely arrived, and already facing a hellish start. Should he just cut his losses and run to pledge allegiance to Prince of Qin Li Shimin? Everyone says Li Shimin is a master of both letters and arms, but few realize that Crown Prince Li Jiancheng is every bit his equal. With an identity like his, running away would mean certain death. He decides to take a gamble and head to the study to find Li Jiancheng, coming clean about being a transmigrator. “Your Highness, I need to come clean. I actually transmigrated here from a thousand years in the future. Tomorrow, you and Prince of Qi are doomed.” “Boy, I think you're the one who's doomed today.” “Your Highness may not believe me, but today Prince of Qin went to the imperial palace and denounced you and Prince of Qi. Tomorrow morning, His Majesty will summon you and Prince of Qi to the palace to confront Prince of Qin. The soldiers guarding Xuanwu Gate have already been bribed by Prince of Qin. When the time comes, a hundred ambushers armed with swords and axes will kill you and Prince of Qi.” “Your Highness, His Majesty has issued an edict. He summons you and Prince of Qi to the palace tomorrow morning.” What? “Yun, tell me, how do we get out of this?” “Your Highness, why don't we turn their own plan against them?” This time, the arrival of a transmigrator changes the Tang dynasty forever.