Because that first love had rescued Zhiqiu several times, having gone through the ordeal of Zhiqiu being persecuted, therefore, he counts as a witness.
Of course, it would be even better if he also had physical evidence.
Nan Zhifeng was constantly preoccupied with that book and had no appetite for food.
Seeing her so anxious, Long Xingye hurried Lingling and Zhuzhu to eat faster, then rushed to take Nan Zhifeng back to the old house to search for the book.
In the car, Long Xingye told Nan Zhifeng that he had bought that apartment with the money he earned when he first started making music; the place wasn't big, but it held sentimental value for him, so he never sold it and just kept it for storing things.
Lingling said she occasionally went to help Long Xingye tidy up, and the stuff inside the apartment hadn't been touched, so those books should definitely still be there, it's just uncertain whether the phone number was written in those books.