The special diet was something that Mu Yuchen had asked the doctor to prescribe so that Xi Xiaye could restore her health.
Since Xi Xiaye gave birth to Mu Xiaocheng prematurely, her body suffered a lot of physical trauma after that, and the chances of getting pregnant were very slim. In fact, Xi Xiaye had vaguely noticed that deep down, even though Mu Yuchen was okay with it, she had always wanted a daughter, so she had been worrying about that.
In desperation, Mu Yuchen could only ask an experienced doctor to prescribe a special diet for her to restore her health. Her complexion was much better recently, and she was not as thin as before. She used to be so frail that it seemed like she could get blown away by the wind, but now, she had gained a little bit of weight.