The Little Sister Next Door Is My Playmate

She is Song Yihuan, the daughter of the Song family who was in trouble. She accidentally got lost and was picked up by Wang Yucheng next door. Therefore, she learned the true identity of this girl and exchanged identities with her own daughter. The male protagonist Li Feng and the heroine Song Yihuan were childhood playmates. Do they meet and recognize each other? Song Yihuan was picked up by his next door neighbor Song Cheng and named Song Yusheng. When Wang Yucheng learned the girl's true identity, he abandoned her at the door of the Song family next door and decided to let his daughter replace her as the daughter of the Song family. In this way, the two girls grew up in different lives... Can Li Feng and He recognize that the little sister next door is her playmate?