The suitcase, Song Yansheng remembered, belonged to Shi Nuan.
Back when he sent Shi Nuan to school to pack her belongings, she only brought back some books.
And the suitcase used to hold those books is this one.
But now, the books are all neatly placed on the bookshelf; this suitcase should contain only Shi Nuan's personal belongings and some of her old clothes.
He had set up a wardrobe in the room for Shi Nuan to place her old clothes, but she didn't use it.
And although she wore the pile of clothes he bought her, she didn't wear them very much.
Song Yansheng walked up to the suitcase; it was a combination lock, requiring a password to open.
Song Yansheng first tried Shi Nuan's birthday, but it didn't work.
Finally, with trembling fingers, he tried Shen Zui's birthday, but that didn't work either.
He pondered for a moment, then used Xiao Chuan's birthday, and unexpectedly, the lock immediately opened.
At that moment, he didn't know what to feel.