When Zhu Hongyan got married, her little aunt Li Sufang only gave a 20-yuan red envelope, and usually always took advantage of her family. When Zhu Juanjuan got married, Zhu Hongyan returned a gift of 21 yuan. Feeling she lost face, Li Sufang threw a huge public scene and threatened to cut off sisterly ties. She distorted the facts and posted them online, inciting netizens to cyberbully Zhu Hongyan's family. After Zhu Hongyan published the full truth, public opinion reversed, and Li Sufang was condemned by everyone. Her husband divorced her, and her children and relatives gradually distanced themselves. Filled with deep regret, she went to beg for forgiveness, but was ignored by Zhu Hongyan. Under long-term melancholy, Li Sufang died of depression. Human interactions and etiquette rely on mutual respect.