I Went to the Capital to Marry a Princess, but She Married an Impostor Instead

I came to the capital from Jiangnan to marry my fiancée, only to discover that she was already married. Jiang Wan Ning, the Princess Zhaoyang renowned throughout the capital, had married six months earlier. Her husband was He Yunshen, the son of the Jiangnan Censor, who had grown up with her as her childhood sweetheart. I stood outside the princess's residence, frowning. He was He Yunshen, the son of the Jiangnan Censor. Then who was I?