Zhang Ailing’s love letter to Hu Lancheng has only eight words: Because she understands, she is compassionate. Previously, Hu Lancheng gave Zhang Ailing another sentence, "Because we know each other, we understand." When a talented woman of a generation meets a man who understands her well, she can give everything she has to achieve an alluring love. Even if love betrays you, you will still be infatuated without hesitation, just because this man is the only one in the world who understands you. This man filled the lonely woman's heart, so she could tolerate the man's betrayal again and again, so she was compassionate, but the ending was still very sad.