Although Bo Yan was the first to hold the child, for him, taking care of, holding, and playing with a child were all still novel experiences. Since the shooting schedule for the day had already concluded, he and Xia Siyu used the excuse of "needing to bond with the child to develop rapport for better acting" to circle around the child as soon as they wrapped up.
The child's mother was originally a fan, especially of Bo Yan.
She came to sign up when she heard the production was recruiting, and that it was Bo Yan's crew, immediately running to register. To her surprise, she was successful.
Seeing how Bo Yan was so attentive to the details of child care, but with a rather calm demeanor, she thought he was learning to play with the kid only for the sake of acting and didn't think much of it.