What is Xu Qiu's diary about the most beautiful time? How was the diary found?

She lost her mother when she was young, and hated her father's remarriage, so she was demonic to Malatang {originally named Xu lianshuang}, a half sister. When she was young, she was forced to bully her sister. It was written in many places in her diary that when she grew up, she went to study in New York and met Song Yi, the man who loved her most. For her, Song Yi was like a bunch of warm sunshine shining into her lonely life Xin, she began to approach him to seduce him. I don't know if I use the word seduce properly. But when I read my diary, I can't help but come up with this word. Ha ha... The following excerpt from the original words of the diary {I {Xu Qiu} gave him the phone {Song Yi}, but he didn't call me. My life is just too poor. I like to use my brain. My friend got together at the beach and I heard that he would go too, so I went too. I wore a beautiful skirt and took my violin with me. My friend asked me to play a song. I readily agreed to stand far away from them and give him a profile of the seaside. I chose "Liang Zhu", because the sea under the stars is lonely. I heard that he can write ancient poetry, so I believe he will understand. At the end of the song, even foreigners in the distance are clapping, I hurried back, just want to see his eyes. Later, he invited him to dance, adopted a stray dog [the dog was bought online} and helped poor children to go to school together. After a long time, Song Yi's shoes fell into the tender land without any suspense. However, she was not his princess. She was born a dancer in the dark. She yearned for the light, but was attracted by the dark. So when K She finally betrayed Song Yi when she appeared. She took drugs and cheated. She listened to Song Yi's endless love talk to her on the phone, but she was happy and depressed under K. her temper became more and more violent and moody. She often found excuses to quarrel with Song Yi, and then prayed for his forgiveness again and again. Because she felt guilty, she wanted to break up with Song Yi, because she knew that since she had a relationship with K She can't be with Song Yi when she's tied up. She knows her heart very well. She is a flower blooming in the dark. She has an evil soul. She doesn't want to consume the sunshine like Song Yi. She doesn't want him to be hurt by her. In the end, she died in a car accident and donated her kidney to her sister. Song Yi has been living in yearning and guilt for her, locking up her heart and refusing to accept her The heroine's persistent love for him for ten years in Jue Ben... Song Yi's relationship with Malatang is also because he knows that Xu Qiu donated a kidney to her. Xu Qiu is the soul of the whole novel.