While receiving an IV drip in the morning, Old Lady Sun observed the opposite side for the entire morning. Ding Hai's biological mother hadn't noticed at all that her son had been switched. Instead, she was sad, dazed, and kept crying.

Seeing such a thing in the same ward, it would be strange not to ask, so Mrs. Sun pretended to be concerned and asked, and later found out that Ding Hai's grandfather had passed away.

Later, perhaps the nanny's persuasion was effective, and Ding Hai's mother gradually stopped crying. Mrs. Sun saw this as a good opportunity and took the opportunity to ask about where Ding Hai's parents were from, what they did for a living, etc. At first, the nanny kept silent, but then Ding Hai's mother spoke a little bit herself, and gradually the three women started chatting together. She said that her family was from Kyoto, her husband was a soldier, and his surname was Dong.

Kyoto, soldier, surnamed Dong. Old Mrs. Sun memorized these key words, knowing exactly where to go to look for her son.

On the third day, the doctor, while checking the ward, reported that Ding Hai had improved, but the child across the street hadn't. Why were the two children recovering at such different rates despite both suffering from pneumonia? Ding Hai came to the hospital as soon as he developed a fever, while Mrs. Sun's child had been at home with a fever for several days. It wasn't that Mrs. Sun refused to see the child, but rather that her mother-in-law wouldn't let her come, claiming she had no money. This delay prolonged the child's treatment, leading to a more serious condition.

Furthermore, Ding Hai's mother ate nutritious food while she was pregnant, while Old Lady Sun had nothing to eat. The two women's diets during confinement were even more different, and their milk naturally had different nutritional values. One was thick and burnt yellow, the other was clear and watery. Like building a foundation, Ding Hai had been nourished since the womb, thus developing a strong immune system. Old Lady Sun's child, on the other hand, was already poorly nourished, and at almost three months old, he was about the same size as Ding Hai, who was only forty days old.

On the third day, at Mrs. Sun's insistence, Ding Hai was discharged directly from the hospital without receiving any IV drips. This was not only because Ding Hai had improved, but also because Mrs. Sun saw her husband was fascinated by Ding Hai's mother.

After being married for more than ten years, she knew that her husband was not a good person, but just watching her husband staring at the woman standing by the window just one step away and fantasizing about her, Mrs. Sun was almost overwhelmed by hatred.

She didn't dare to blame her husband, but only blamed Ding Hai's mother for being so beautiful and seducing. She turned all her hatred into something and finally vented it on Ding Hai.

After returning to the village, they treated the child completely differently than before they left. He cried when he cried, and went hungry when he was hungry. She might not hold him once a week. It was common for him to not change his diaper all day, and it was common for him to be fed only once a day. Eventually, Mrs. Sun's mother-in-law couldn't stand it anymore, so she took the four-month-old child into her own room, feeding him rice porridge and taking care of him herself. Thanks to this mother-in-law, Ding Hai was able to grow up safely.

These things were heard by Ding Jianjun, the eldest son of the Ding Lei family, when his grandfather was still alive. He was young and heard his grandmother talk to him. At that time, everyone thought Ding Jianjun was too young to talk behind his back. By then, Ding Jianjun was old enough to remember things and knew that his uncle was not his grandparents' biological son. The real uncle replaced Ding Hai and lived in the wealthy family.

Why did grandma want to come to Kyoto? One reason was to find Ding Hai, and another reason only he knew was to see how his real uncle was living.