The "18 Warriors of Sui-Tang Period" (Chinese: 隋唐十八条好汉) are fictional legendary heroes who lived during the Sui and early Tang dynasties. The concept of the 18 Warriors was first introduced in the traditional historical novel Shuo Tang. The warriors' rankings are based on their martial arts skills and physical strength. Some of them are based on historical figures, such as Qin Shubao and Shan Xiongxin, while others were invented as folk heroes, such as Luo Cheng and Yuwen Chengdu.