Bai Zi Fo Lang Ji (百子佛郎機)

Note: This blog post was originally part of my Breech-loading Cannons of the Ming Dynasty article. However, I decided to split (and slightly modify) this section into its own separate article for cleaner navigation, tidier organization, and easier reading and digestion.

Drawing of a Bai Zi Fo Lang Ji, its gun carriage, and three loading chambers. From Qing period 'Yi Hai Zhu Chen (《藝海珠塵》)'.

The Bai Zi Fo Lang Ji (百子佛狼機, lit. 'Hundred-bullet Fo Lang Ji') was an advanced variant of the heavier type of Fo Lang Ji breech-loading cannon designed by Ming firearms specialist Zhao Shi Zhen (趙士楨), who made several key improvements to the weapon. Namely, Zhao Shi Zhen lengthened and reinforced the gun barrel and mounted it on a wooden tiller, while also designing a wheeled gun carriage for the weapon.

The design of the wheeled gun carriage was where Zhao Shi Zhen truly demonstrated his genius. The unique gun carriage was of two-wheeled design (though the wheels were detached prior to firing), equipped with four swing-down stands, paired thills at the rear, along with two L-shaped anchoring irons at the front that anchored the carriage to the ground to counteract recoil.

In addition, Zhao Shizhen also fitted an iron bucket densely packed with cotton at the rear of the gun carriage to act as a recoil absorber, and replaced the deck planks of the gun carriage with wooden conveyor rollers, so that upon firing, the cannon slid rearward along the rollers against the bucket, compressing the cotton buffer to dampen the recoil—in essence, he had invented an early form of sliding recoil mechanism in the early 17th century.

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Lian Zhu Pao (連珠砲) and Yu Gu Pao (漁皷砲)

Drawing of a Lian Zhu Pao (right) and Yu Gu Pao (left), from 'Wu Bei Ji Yao (《武備集要》)'.

Lian Zhu Pao (連珠砲, lit. 'Rapid bead cannon') and Yu Gu Pao (漁皷砲, lit. 'Fisherman's drum cannon') were two types of lightweight cannons commonly used by Ming border armies of the strategically important San Bian (三邊, lit. 'Three borders') of Shaanxi Province, namely Gansu Defence Region (甘肅鎮), Yansui Defence Region (延綏鎮), Ningxia Defence Region (寧夏鎮), as well as the main headquarters, Guyuan Defence Region (固原鎮).

The two cannons were more or less identical, except for the lack of reinforcing hoops in Yu Gu Pao. Both cannons were around three chi in length, six fen in barrel thickness, and had a bore diameter of around one cun one fen (1.4 in / 35.2 mm). Designed to be carriable by just one person, these cannons could either launch a single one cun diameter lead cannonball at considerable distance using five to six liang of gunpowder, or loaded with additional lead or iron pellets for close range scatter shot.

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Hu Wei Chong (虎尾銃)

Drawing of two Hu Wei Chong mounted on a double-ended stand, from 'Wu Bei Ji Yao (《武備集要》)'.

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Qian Dan Yi Wo Feng (鉛彈一窩蜂)

Qian Dan Yi Wo Feng (鉛彈一窩蜂)

Drawing of Qian Dan Yi Wo Feng in shoulder bag for transportation (top right), and the same cannon when deployed (top bottom), from 'Wu Bei Ji Yao (《武備集要》)'.

Qian Dan Yi Wo Feng was a portable anti-personnel cannon that entered Ming arsenal in the early to mid-sixteenth century. Forged with the same method as a matchlock gun barrel, Qian Dan Yi Wo Feng had a short but wide body that could be loaded with up to 100 lead bullets, yet was light enough to be carried by a single person. It also came with a small iron bipod, which was used to prop up the muzzle when the cannon was staked to the ground for firing, as it had little to no extra weight to offset its considerable recoil.

Qian Dan Yi Wo Feng was also known as Bai Zi Chong (百子銃, lit. 'Hundred bullets gun'), although it should not to be confused with another weapon of the same name. It may also be the predecessor of Hu Dun Pao (虎蹲砲).

Volley gun version

Drawing of a matchlock volley gun Yi Wo Feng, from 'Wu Bei Ji Yao (《武備集要》)'.

This version of Yi Wo Feng, though still called by the same name, was only inspired by but not directly related to the anti-personnel cannon above. It was actually a matchlock volley gun that consisted of four to six gun barrels recycled from damaged matchlock guns, modified and bundled together and mounted on a wooden receiver that also housed a matchlock mechanism and a handle bar. The volley gun was mounted on a tripod-like gun mount that allowed the gun to be freely traversed and elevated, and each of its gun barrels was loaded with four lead bullets.

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Di Lei Lian Pao (地雷連砲) and Xun Lei Pao (迅雷砲)

Di Lei Lian Pao (地雷連砲, lit. 'Ground thunder rapid cannon')

Drawing of three soldiers firing three Di Lei Lian Pao, from 'Wu Bei Zhi (《武備志》)'.

Di Lei Lian Pao was a small volley gun that consisted of 10 small cannons brazed to a solid iron stock in a fan shape. Originated from Shaanxi (陝西) region of Northwest China, Di Lei Lian Pao was a very lightweight weapon weighing only twenty jin (11.8 kg or 26 lbs) which allowed the weapon to be easily deployed and transported without a wheeled gun carriage—an important feature allowing the weapon to be used more effectively against fast-paced Mongol horsemen. Despite being a volley gun that fired its shots in a spread, Di Lei Lian Pao was still fitted with an iron sight.

To prevent the huge recoil generated by all ten barrels firing simultaneously from throwing off such a light weapon, potentially even hurting its user, the iron stock of Di Lei Lian Pao had an integrated ring that allowed the weapon to be staked to the ground during use.

Drawing of one soldier firing multiple Di Lei Lian Pao, from 'Wu Bei Zhi (《武備志》)'.

Di Lei Lian Pao was originally a tripwire gun that uses Gang Lun Fa Huo (鋼輪發火) as its triggering mechanism (hence 'Di Lei [地雷]' in its name), although this was later changed to having a gunner to manually fire the volley gun, as this was found to be much more convenient and responsive.

Di Lei Lian Pao utilised a two-stage fuse, which consisted of a very short section of normal fuse (i.e. Chinese paper fuse), known as Zou Xian (走線, lit. 'Walking thread'), connecting to a much longer section of flat quickmatch fuse, known as Bian Xian (扁線, lit. 'Flat thread') that extended all the way to the touch hole of the volley gun. The use of long fuse to ignite Di Lei Lian Pao allowed the gunner to stand at a safe distance from the weapon, as well as for a single gunner to operate multiple guns by himself.

Xun Lei Pao (迅雷砲, lit. 'Quick thunder cannon')

Drawing of a Xun Lei Pao, from 'Li Qi Jie (《利器解》)'.

Xun Lei Pao was basically a larger, lighter, more powerful, but single shot version of Di Lei Lian Pao. It was a small iron cannon weighing only 10 jin (6 kg or 13 lbs) and came with a slightly flared muzzle, front and back iron sight, as well as an extended solid portion behind the cannon breach with a hole punched through it to allow the cannon to be staked to the ground during use much like its multi-shot counterpart.

Xun Lei Pao should not to be confused with Xun Lei Chong (迅雷銃), a weapon with similar name.

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Bai Zi Chong (百子銃)

Bai Zi Chong (百子銃, lit. 'Hundred bullet gun')

Late Ming Bai Zi Chong discovered at an ancient battle site in Sichuan.

Bai Zi Chong, also known as Bai Zi Lian Zhu Pao (百子連珠砲, lit. 'Hundred bullet rapid fire cannon'), was the Chinese name for a muzzle-loading swivel gun. Prized for its wide arc of fire and accuracy, the Bai Zi Chong served primarily as shipborne anti-personnel ordnance and in siege defence.

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Sai Gong Chong (賽熕銃)

A Sai Gong Chong and its ramrod, from 'Bing Lu (《兵錄》)'.

Sai Gong Chong (賽熕銃 or 賽貢銃, lit. 'Gun that can match a Fa Gong') was another cannon designed by Ming general Qi Ji Guang (戚繼光). It was a three chi long muzzle-loading cannon, usually loaded with one lead cannonball weighing half jin, a departure from the standard practise of using multiple smaller shots in most Ming artillery.

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Hu Dun Pao (虎蹲砲)

A Hu Dun Pao in remarkable preservation condition.

Hu Dun Pao (虎蹲砲, lit. 'Tiger crouching cannon') was a type of iron cannon widely used by the Ming army. It was perhaps the weapon that best represents the Chinese artillery doctrine of the Ming period.

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Breech-loading cannons of the Ming Dynasty

UPDATED MAY 7, 2022, minor update DECEMBER 31, 2025

Large Fo Lang Ji from the Nanjing City Wall Museum.

Fo Lang Ji (佛郎機, lit. 'Frankish engine'), named after the Chinese name for Portuguese people (itself a Chinese transcription of related terms farang/farangi/ferenggi, used in the Muslim world to refer to White Europeans), was the Chinese version of breech-loading swivel gun, which they reverse-engineered from the Portuguese. 

Fo Lang Ji actually entered Chinese arsenal surprisingly early—the weapon came to the attention of the Ming court in October 1517, after a translator working on a Portuguese ship (likely a part of Fernão Pires de Andrade's fleet, which visited China in the same year) gifted a cannon and gunpowder formula to Gu Ying Xiang (顧應祥) during an anti-piracy operation. However, Imperial prince Zhu Chen Hao (朱宸濠) already manufactured some Fo Lang Ji in secret as early as May 1517 in preparation for his rebellion two years later, suggesting that the general populace may have learnt of this weapon well before the Ming court. In any case, after Sino-Portuguese relations turned sour, Ming navy sent to evict the Portuguese from Guangdong quickly found itself at the receiving end of this devastating weapon during Battle of Tunmen in 1521. In the ensuing blockade, Deputy Marine Commissioner (海道副使) Wang Hong (汪鋐), through military inspector He Ru (何儒) acting as an undercover agent, successfully enticed two Chinese sailors working for the Portuguese to defect. With the technical know-how acquired from these defectors, Wang Hong successfully reverse-engineered the Fo Lang Ji in a little under 40 days, then proceeded to use the new weapon to defeat the Portuguese. 

After the conflict, Wang Hong became a fervent advocate of the Fo Lang Ji and wrote several memorials to the throne to promote the weapon. In 1523, Beijing arsenal began to manufacture the Fo Lang Ji on an official basis, soon followed by Nanjing arsenal in 1524. By 1529, a mere seven years after the initial production run, virtually the entire country had been equipped with this new weapon. The Fo Lang Ji quickly supplanted older Chinese cannons and became the most important artillery piece in the Ming arsenal. 

Fo Lang Ji (佛郎機)

A standard Fo Lang Ji swivel gun, from 'Lian Bing Za Ji (《練兵雜紀》)'.

While the basic design of Fo Lang Ji was virtually unchanged from its Portuguese predecessor, Chinese gunsmiths created a great number of variant designs of nearly every size, power, and platform imaginable, ranging from downsized handheld guns, to standard-sized models mounted on small gun carriages or saddle frames similar to zamburak, to heavier piece mounted on war carts, warships and gun emplacements.

Ying Zhua Fo Lang Ji (鷹爪佛狼機, lit. 'Eagle talon Frankish engine')

Drawing of a Ying Zhua Fo Lang Ji, from 'Wu Bei Ji Yao (《武備集要》)'.

Ying Zhua Fo Lang Ji was simply a small Fo Lang Ji mounted on a three chi tall iron spiked tripod (which gave the weapon its name).

Fei Shan Shen Pao (飛山神砲, lit. 'Flying mountain divine cannon')

Drawing of a Fei Shan Shen Pao, from 'Lian Bing Za Ji (《練兵雜紀》'.

Fei Shan Shen Pao was a medium-weight Fo Lang Ji with two pair of trunnions.

Wu Di Da Jiang Jun (無敵大將軍, lit. 'Invincible great general')

Drawing of a Wu Di Da Jiang Jun, from 'Lian Bing Za Ji (《練兵雜紀》)'.

Wu Di Da Jiang Jun was a heavy breech-loading cannon primarily designed for close range anti-personnel purpose. A single blast from this cannon could rain death over a very large area in a manner not unlike a giant shotgun—each of its three chambers were loaded with one heavy stone ball and a whopping 365 iron pellets—although the stone ball was still capable of pulverising walls and buildings.

Weighing one thousand and fifty jin (619.5 kg or 1,366 lbs), Wu Di Da Jiang Jun was one of the heaviest cannons in Ming arsenal until the advent of Hong Yi Pao (紅夷砲). Regrettably, while it was undoubtedly devastating, Wu Di Da Jiang Jun was actually slightly underpowered for a cannon of this size due to its breech-loading nature, relatively short barrel, and the fact that its projectile weight and black powder load were limited by the size of its chamber. These shortcomings eventually led to the development of lighter and more powerful Ye Gong Shen Chong (葉公神銃).

Wu Di Shen Fei Pao (無敵神飛砲, lit. 'Invincible divine flying cannon')

Drawing of a Wu Di Shen Fei Pao, from 'Ji Xiao Xin Shu (《紀效新書》)'.

Wu Di Shen Fei Pao, sometimes shortened to Shen Fei Pao (神飛砲, lit. 'Divine flying cannon'), was a slightly shortened naval variant of Wu Di Da Jiang Jun. Each of its three chambers were loaded with a heavy stone ball and 200 iron pellets, although iron pellets were sometimes omitted to increase the power of stone ball.

Like its land-bound counterpart, Wu Di Shen Fei Pao was the heaviest naval artillery available to Ming navy until the advent of Hong Yi Pao.

Shen Fei Pao (神飛砲, lit. 'Divine flying cannon')

Drawing of a Shen Fei Pao, from 'Jun Qi Tu Shuo (《軍器圖說》)'.

Recorded in seventeenth century military treatise Jun Qi Tu Shuo (《軍器圖說》)', Shen Fei Pao appears to be a streamlined and more powerful version of Wu Di Da Jiang Jun/Wu Di Shen Fei Pao, lacking the iron rings used for lifting the cannon found on Wu Di Da Jiang Jun, but came with gunsight-equipped, wrought iron chambers.

The largest "Mark 1" Shen Fei Pao was 8 chi (256 cm or 8'5") in length and 1,000 jin (590 kg or 1300 lbs) in weight. Its five chambers were 1 chi 5 cun (48 cm or 1'7") in length, 80 jin (47.2 kg or 104 lbs) in weight, and had a bore size of 7 cun (22.4 cm or 8.8"). They were typically loaded with either a heavy 25 jin (14.75 kg or 32.5 lbs) stone ball, or 200 stone pellets plus 500 iron pellets (but not both at the same time unlike Wu Di Da Jiang Jun/Wu Di Shen Fei Pao), propelled by 5 jin (2.95 kg or 6.5 lbs) of black powder.

Other variants

There were also many known models of Fo Lang Ji without accompanying illustrations. Examples include Ma Shang Fo Lang Ji (馬上佛郎機, lit. 'Horseman's Frankish engine') designed to be used on horseback, Lian Zhu Fo Lang Ji Pao (連珠佛朗機砲, lit. 'Rapid fire Frankish engine'), an iron double-ended Fo Lang Ji with shortened barrels, as well as Liu Xing Pao (流星砲, lit. 'Shooting star cannon'), a type of brass Fo Lang Ji with rectangular-shaped open breech and lengthened barrel.

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