Familiar things, especially those played with in childhood, can most easily evoke memories.
Even though these were things Yan Fei played with as a child, Xu Xiaoyan was quite familiar with them too—Yan Fei had no one to play with then, so he'd bring toys to play with Xu Xiaoyan. So many of those things, in fact, Xu Xiaoyan had played with herself.
Flipping through a small comic book priced at 0.15 yuan, Xu Xiaoyan's mood gradually relaxed.
Seeing the girl become increasingly happy, Yan Fei felt a sense of relief: Luckily...
Thinking about it, maybe people are naturally inclined to collect and store treasures; all children have some "secret treasures" that they feel should be stashed away somewhere. Maybe it's some marbles, little stickers, a few old coins, or maybe a gift from a "brother for life"—these things, when hidden away, might eventually even be lost to oneself.
When Xu Xiaoyan finished flipping through a picture book, she turned and laughed: "What are you doing?"