Si Mu thought about it and realized it was true; after Niannian got lost, he hadn't seen his grandmother shed a single tear. Instead, she invited people over to play mahjong every day and lived quite happily.
As for favoring boys over girls, she didn't seem to — she was very good to Si Yu.
Si Yu was brought back from their old home by his grandmother ten years ago. Si Yu was ten at the time and said to be a distant relative of his grandmother, with both parents gone. Someone had divined that Si Yu's fate was auspicious, bringing prosperity to her husband and the clan, so she was registered under his father's name to be raised as a daughter.
He was nineteen that year and already taking over the family business; he had no time or energy to care for this adopted sister. It wasn't until a few days ago, when Gu Lin asked him if he was engaged to Si Yu, that he almost forgot about this adopted sister.