People should be calculative in order to live and survive; naivety means instant death.
Jiang Xue Li ripped the hem of her dress and tied her hair into a bun. It seems like her grandfather is playing games with her again. It just rain but he was making her do this childish play. She has no time for this!
"What? Where's my…"
It was only now that she remembered that her daggers were not with her. It was taken by her brother earlier after she completed her mission. Upon realizing what happened, she sneered, "Zhiyi, you little brat!" she cursed after recognizing the fact that she got played by him and her grandfather.
It's safe to conclude that, her grandfather planned to lure her inside without her weapons. This kind of arrangement was very obvious and since she never plays by the rule, he took away her cheat code.