As to the reason for Zhou Yilin's different disposition in public and private, it was very much related to her family background.

She was an orphan at an orphanage until she reached the age of six. Afterwards, she was adopted by her current adoptive parents because their biological daughter went missing when the latter’s grandmother brought her out to play. Zhou Yilin’s adoptive grandmother wanted to see her biological granddaughter for one last time before she passed on. Hence, Zhou Yilin's adoptive parents visited the orphanage to adopt a girl such that the grandmother would rest in peace.

They didn't harbour any feelings towards Zhou Yilin and wouldn't dote on her as their own. They only warned her to be obedient and listen to them or they would send her back to the orphanage.

Ever since Zhou Yilin became part of the family, she knew that her adoptive parents were waiting for their biological daughter to return. They would never let her, someone who was not related by blood, to replace the spot their biological daughter had in their hearts.

In order not to be disowned, Zhou Yilin tried very very hard to show her obedience and sensibility. She studied diligently...