Xiaoxiu said, I have made this home clear. On the surface, this family is very good, but in secret, there are unknown secrets. In a word, I won't stay in this house for long. I can ask this family for some money first. This is the content of Xiao Xiu's letter to Chen Youxi, and the word "Qing" is very important.
Judging from Xiaoxiu's letter, she really caught the Li family's handle and was instigated by Wang Zhongjiang to have the idea of going to Guangzhou to ask the Li family for money.
This secret may be a matter of literary works. Liao Suifang knew that the literary works were drowned in the washing machine, but Li Chengtian concealed it. Judging from the information of the first episode entering the Li family house, there is a report of "going all over China to look for his daughter", which shows that Li Chengtian really went to other places to look for his daughter's literary works. He once regarded Chen Youxi as his daughter, which can also prove that Li Chengtian didn't know that his daughter drowned in the washing machine.
So, Xiaoxiu knows that this may be about Liao Suifang hiding the news of Wen Wen's death. She threatened to ask Liao Suifang for money, and there was an argument. Zhuo Zhuo saw her bullying her mother, so she pinched her little show. Finally, Liao Suifang killed Xiaoxiu, and Li Chengtian disposed of Xiaoxiu's body, leaving green nails as a bargaining chip to blackmail Liao Suifang.