Actually, speaking of Fang Ping'an and Li Yuchun, although the two of them had some misunderstandings before, always thinking Fang Pingying wasn't their biological daughter, they feared that when they got older, Fang Pingying wouldn't be as filial as a biological daughter might be, which made them always calculative when doing things.
But they were smart in that no matter the circumstances, they knew to be content, to be grateful, and to treat people sincerely after seeing the truth of things clearly.
