Hu Dun Pao (虎蹲砲)

Ming Dynasty Tiger Crouching Cannon
Drawing of a Hu Dun Pao, from 'Lian Bing Za Ji (《練兵雜紀》)'.
Hu Dun Pao (虎蹲砲, lit. 'Tiger crouching cannon') is a type of iron cannon widely used by the Ming armies. It is perhaps the weapon that best represents the Chinese artillery doctrine of the Ming period.

A typical Hu Dun Pao has a length of one chi nine cun, and weights thirty-six catties. It has bore diameter of two cun, usually loaded with six to eight liang of powder, fifty large lead or iron shots or one hundred smaller ones, and a large stone ball (later replaced by iron ball). For its size, Hu Dun Pao is an extremely powerful cannon, yet it is light enough to be carried by one or two men. Hu Dun Pao has a characteristic bipod that enables it to be staked firmly to the ground, so that the cannon will not jump violently due to recoil. The bipod, combined with the compact size of the cannon, allows multiple Hu Dun Pao to be fired in close proximity to each other, potentially increase the firepower manyfold.

Ming Chinese Tiger Crouching Cannon
A very large Hu Dun Pao at Wolongtai Great Wall section, Xinyang, Henan, China.
Joseon Hojunpo
Korean copy of the Hu Dun Pao, known as Hojunpo (호준포). Korean copies of Chinese cannon tend to be much smaller than their Chinese equivalents.
Hu Dun Pao was designed by general Qi Ji Guang (戚繼光) to replace the aging Er Jiang Jun (二將軍, lit. 'Second general'), Ying Zi Pao (櫻子砲, lit. 'Cherry seed cannon'), Du Hu Pao (毒虎砲, lit. 'Vicious tiger cannon') and Wan Kou Pao (碗口砲, lit. 'Bowl-muzzle cannon') of the early Ming Dynasty. Qi Ji Guang criticised these early cannons for being either too weak, too bulky, or have uncontrollable (and very dangerous) recoil, and designed Hu Dun Pao specifically to address these issues. In Qi Ji Guang's army, one Hu Dun Pao was issued to every fifty infantry and every forty-five horsemen. Later during the Imjin War, heavy variant of Hu Dun Pao was employed as siege cannon and naval gun, although it was not particularly suitable for either role, as its arc of fire was too high to reliable hit enemy wall, and recoil too powerful for Chinese warships (the recoil would damage the ship).

Although a very successful design, the limitation of Ming Dynasty firearm technology was clearly evident on the Hu Dun Pao. The Chinese never developed grapeshot and canister shot, thus powder, sabot and shots have to be loaded separately into the barrel, greatly reducing rate of fire as well as range and firepower (due to larger windage). Besides, Chinese did not develop wheeled gun carriage on their own until very late (they adopted gun carriage from the Europeans, and later devised several indigenous designs for their newer cannons, but its use was very uncommon), which severely affected the size, mobility and battlefield maneuverity of their artillery. Chinese cannon had to be made very light to be transportable at all, yet the advantage of lighter weight could not be fully utilised because it had to be staked to the ground.


  1. Hi. I like your blog. Do you happen to have information on the banner designs that the Ming used, especially during the Imjin War? Are they similar to the Koreans who used the guardian beasts (Azure Dragon, White Tiger, Black Turtle, Vermillion Bird)?

  2. @Jayson
    (You double posted so I removed one of the comment, since both comments are identical =D )

    Glad you like my blog =).
    There are plenty of (drawing of) Ming banners available in military treatises, but mostly in black & white. The Ming certainly used the four Guardians (five to be precise, they had a 'Rising Snake' as central Guardian/banner) as their military banner, along with many, many other such as Taoist sages, constellations, or Chinese zodiac.

    The most appropriate banners for the Imjin War period should be the banners from Qi Ji Guang's manual.

    A good place to start:

  3. Thanks. Will check that out.