I recommend the book "The Arrival of the Wife: The Dumb Concubine of the Masked Prince" to you. Although the female lead isn't Qingcheng Xia, the plot is similar to the female lead described in the question. She transmigrated to the prime minister's manor and married the foolish prince. This book has a hilarious plot and a suspenseful puzzle. I believe you will be pleasantly surprised. I hope you like this fairy's recommendation. Muah ~😗