As someone who's experienced, he understood the little thoughts of young men and women, so when Hao Jian said that, and he saw his daughter's expression, he already knew everything.
However, if it were anyone else, he wouldn't agree to let his daughter be alone with him. The reason he smiled brightly when he heard Hao Jian was that he thought Hao Jian was nice, a good young man. Also, of course, he knew a little about his daughter's feelings—living with her for so long, how could he not know what's in her heart?
Though every time Hao Jian came, she didn't show a good face, often urging him to leave, he'd seen it all. Despite such behavior every time, his daughter surely didn't want Hao Jian to go, and every day she hoped for his visit. Yet once he arrived, she'd take on that attitude, and once he left, she'd feel lost, waiting for him to come.
