C452 Surprise

The crossbows here were of different sizes and shapes. The larger ones required five to six people to operate them, while the smaller ones only needed to be tied to their wrists. There were many types.

Tang Kexin looked at Gu Xiuran in astonishment. Back then, she had only told him the theory, but she had only studied it thoroughly over three years. Gu Xiuran was deeply secretive