Pretended to Be a Prince for Three Years, but Was Discovered by the Princess at the Beginning

My name is Li Chengfeng, and I have been pretending to be the Prince of Dayan for three years, and I have never made any mistakes during this period. Until that day at the palace banquet, the princess from Northern Liang came to marry. At the palace banquet, she raised her glass from a distance, and a voiceless voice touched my soul: "Your Highness is so well-kept." "It's a pity that soul and body are not in harmony." She seemed to see through that I was fake. What should I do? Wait online. It's very urgent!