She could remember indistinctively from reading his diary that she saw an entry that read, "She cried again. I went to dry her tears."
His dairy had recorded more than ten years of their time together. She had finished it in one afternoon, so it was inevitable that there were details that she had missed. She needed to go look for his diary and read through it again. Perhaps there was information inside there that could help her explain this illogical situation.
Song Qingchun found Su Zhinian's diary in his study. The first entry began when he was eight, the year he was sent into the sanatorium. The first ten years mostly recorded his effort to search for and how he missed 'Tingting'.
Song Qincghun flipped through the pages until she reached the point where they graduated from high school and went their separate paths. Finally, she found some clues between the lines.