|Drawing of a Xi Gua Pao and its contains, from 'Wu Bei Zhi (《武備志》)'.|
Xi Gua Pao is usually dropped directly onto unsuspecting enemies from atop a wall, where it will explode into a shower of flame, caltrops and erratically-moving Huo Shu. The barbed Huo Shu hooks onto enemy clothing and burns the victim, causing the panicked victim to be more likely to step on the caltrops.
A smaller version of Xi Gua Pao that only produces sound was used by Jian Ye (尖夜) for signaling.
Zhi Hu Yuan Pao (紙糊圓砲, lit. 'Paper-pasted round bomb')
|Drawing of a Zhi Hu Yuan Pao, from 'Wu Bei Zhi (《武備志》)'.|