Wangye, Nujia Jian Ge Fei

Born into a family well-versed in Chinese medicine, Han Fei woke up one day and found herself transmigrated into another body, unable to even bend down and see her toes! And then she found out that she was headed for an arranged marriage with the prince in the wheelchair. People made fun of their handicaps. The fatty and the cripple, the ideal couple? But for the sake of his handsome face, Han Fei swore that she's going to lose weight! And have herself a grand wedding!
(Source: Kuaikan, translated)
Note: Includes three extras chapters.