Tiangong Kaiwu

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The Tiangong Kaiwu (天工開物), or The Exploitation of the Works of Nature was a Chinese encyclopedia compiled by Song Yingxing. It was published in May 1637 with funding provided by Song's patron Tu Shaokui. [1] [2] [3] The Tiangong Kaiwu is an encyclopedia covering a wide range of technical issues, including the use of various gunpowder weapons. Copies of the book were very scarce in China during the Qing dynasty (1644–1911) (due to the government's establishment of monopolies over certain industries described in the book), but original copies of the book were preserved in Japan. [4]

China State in East Asia

China, officially the People's Republic of China (PRC), is a country in East Asia and the world's most populous country, with a population of around 1.404 billion. Covering approximately 9,600,000 square kilometers (3,700,000 sq mi), it is the third- or fourth-largest country by total area. Governed by the Communist Party of China, the state exercises jurisdiction over 22 provinces, five autonomous regions, four direct-controlled municipalities, and the special administrative regions of Hong Kong and Macau.

Encyclopedia type of reference work

An encyclopedia or encyclopædia is a reference work or compendium providing summaries of knowledge from either all branches or from a particular field or discipline. Encyclopedias are divided into articles or entries that are often arranged alphabetically by article name and sometimes by thematic categories. Encyclopedia entries are longer and more detailed than those in most dictionaries. Generally speaking, unlike dictionary entries—which focus on linguistic information about words, such as their etymology, meaning, pronunciation, use, and grammatical forms—encyclopedia articles focus on factual information concerning the subject named in the article's title.

Song Yingxing Chinese scholar

Song Yingxing was a Chinese scientist and encyclopedist who lived during the late Ming Dynasty (1368–1644). He was the author of Tiangong Kaiwu, an encyclopedia that covered a wide variety of technical subjects, including the use of gunpowder weapons. The British sinologist and historian Joseph Needham called Song Yingxing "The Diderot of China."



It featured detailed illustrations that were valuable for historians in understanding many early Chinese production processes. For example, illustrations for brick-making; one shows a kilnmaster checking the temperature of a furnace while an assistant stands by and douses the kiln to induce superficial glazing; [5] another illustration shows a brick-maker filling a wooden mold with clay while he dresses the brick's surface with a finishing wire strung on a bow. [6]

As the historian Joseph Needham points out, the vast amount of accurately drawn illustrations in this encyclopedia dwarfed the amount provided in previous Chinese encyclopedias, making it a valuable written work in the history of Chinese literature. [4] At the same time, the Tiangong Kaiwu broke from Chinese tradition by rarely referencing previous written work. It is instead written in a style strongly suggestive of first-hand experience. In the preface to the work, Song attributed this deviation from tradition to his poverty and low standing. [7]

Joseph Needham British biochemist

Noel Joseph Terence Montgomery Needham was a British biochemist, historian and sinologist known for his scientific research and writing on the history of Chinese science and technology. He was elected a fellow of the Royal Society in 1941, and a fellow of the British Academy in 1971. In 1992, Queen Elizabeth II conferred on him the Companionship of Honour, and the Royal Society noted he was the only living person to hold these three titles.

Table of Contents

The technical encyclopedia of the Tiangong Kaiwu was divided into separate chapters with broad overall themes, which included

  1. agriculture, irrigation, and hydraulic engineering, [8]
  2. sericulture and textile technology, [8]
  3. agriculture and milling processes, [8]
  4. salt technology, [8]
  5. sugar technology, [8]
  6. ceramics industry, [8]
  7. bronze metallurgy, [8]
  8. transportation; ships and carts, [8]
  9. iron metallurgy, [8]
  10. coal, vitriol, sulfur, and arsenic, [8]
  11. oil technology, [8]
  12. papermaking, [8]
  13. metallurgy of silver, lead, copper, tin, and zinc, [8]
  14. military technology, [8]
  15. mercury, [8]
  16. ink, [8]
  17. fermented beverages, [8]
  18. pearls and jade. [8]


In the first chapter, The Growing of Grains, Song Yingxing wrote about the great necessity of rural farmers in society, and although they were emulated by tradition, were scoffed at by aristocrats throughout time. Song Yingxing began the chapter with the context of this paragraph in mind:

Two types of hydraulic-powered chain pumps from the Tiangong Kaiwu. Tiangong Kaiwu Chain Pumps.jpg
Two types of hydraulic-powered chain pumps from the Tiangong Kaiwu.

Song wrote about the general terms used in agriculture, saying that the "hundred grains" referred to crops in general, while the "five grains" were specifically sesamum, legumes, wheat, panicled millet, and glutinous millet (rice was not included in this, says Song, because the ancients were only used to the environment of northern China, which was devoid of rice at the time). [10] He wrote about the meticulous and proper cultivation of each crop, as well as how to avoid agricultural disasters in the process. [11]

<i>Sesamum</i> genus of plants

Sesamum is a genus of approximately 20 species in the flowering plant family Pedaliaceae. The plants are annual or perennial herbs with edible seeds. The best-known member of the genus is sesame, Sesamum indicum, the source of sesame seeds. The species are primarily African, with some species occurring in India, Sri Lanka, and China. The origin of S. indicum is uncertain as it is widely cultivated and naturalized in tropical regions. The genus is closely related to the strictly African genus Ceratotheca and is itself probably African in origin.

Legume Plant in the family Fabaceae

A legume is a plant in the family Fabaceae, or the fruit or seed of such a plant. Legumes are grown agriculturally, primarily for human consumption, for livestock forage and silage, and as soil-enhancing green manure. Well-known legumes include alfalfa, clover, peas, chickpeas, lentils, lupin bean, mesquite, carob, soybeans, peanuts and tamarind.

Wheat Cereal grain

Wheat is a grass widely cultivated for its seed, a cereal grain which is a worldwide staple food. The many species of wheat together make up the genus Triticum; the most widely grown is common wheat.

In aiding the text, he also provided many different drawn illustrations, including a man loosening the soil by ploughing with an ox, [12] soil broken into fine particles by an ox-drawn harrow, [13] men engaging in foot weeding and hand weeding of rice, [14] a vertical waterwheel with hollow wooden cylinders dipping water into an open woodwork tub feeding an irrigation canal, [15] a cylinder-type chain pump powered by a vertical waterwheel placed in a narrow, low-lying stream with a mounted rotating wheel placed at the top of an elevated plane, whereupon the cylinders fed water into an irrigation canal, [16] a wooden river dam correcting the flow of water around a field of crops, [17] a sluice gate controlling the flow of a water channel, [18] a square-pallet chain pump powered by a horizontal waterwheel, connected by an axle to a gear-tooth wheel above, which in turn engaged a vertical gear-tooth wheel, [19] another square-pallet chain pump employing an ox-drawn set of geared wheels, [20] two different types of foot-treadle operated chain pumps, [21] a counterweighted lever for raising or lowering a bucket, [22] a pulley-wheel for raising or lowering a bucket, [23] an ox-drawn plough-seeder with a cone-shaped filter, [24] an ox-drawn pair of stone rollers, used for pressing seeds into the soil, [25] the simpler process of sewing seeds by hand and pressing them into the dirt by foot, [26] and finally, an illustration of men cultivating wheat with broad-headed hoes. [27]

Ox common bovine draft and riding animal

An ox, also known as a bullock in Australia and India, is a bovine trained as a draft animal or riding animal. Oxen are commonly castrated adult male cattle; castration makes the animals more docile. Cows or bulls may also be used in some areas.

Harrow (tool) agricultural tool

In agriculture, a harrow is an implement for breaking up and smoothing out the surface of the soil. In this way it is distinct in its effect from the plough, which is used for deeper tillage. Harrowing is often carried out on fields to follow the rough finish left by plowing operations. The purpose of this harrowing is generally to break up clods and to provide a finer finish, a good tilth or soil structure that is suitable for seedbed use. Coarser harrowing may also be used to remove weeds and to cover seed after sowing. Harrows differ from cultivators in that they disturb the whole surface of the soil, such as to prepare a seedbed, instead of disturbing only narrow trails that skirt crop rows.

Irrigation artificial application of water to the land or soil

Irrigation is the application of controlled amounts of water to plants at needed intervals. Irrigation helps to grow agricultural crops, maintain landscapes, and revegetate disturbed soils in dry areas and during periods of less than average rainfall. Irrigation also has other uses in crop production, including frost protection, suppressing weed growth in grain fields and preventing soil consolidation. In contrast, agriculture that relies only on direct rainfall is referred to as rain-fed or dry land farming.

In another chapter, The Preparation of Grains, he also provided illustrations for rolling rice grains with a wooden ox-drawn roller, [28] a crank-operated rotary-fan winnowing machine that separated husks, [29] a hand-operated wooden hulling mill, [30] a hand-operated earthen hulling machine, [31] a process of sieving to separate husk-free grains, [32] two types of foot-operated trip hammers, [33] a hydraulic-powered trip hammer powered by a waterwheel that rotated an axle of overhead cams, [34] a horse-drawn hulling mill, [35] an oxen-drawn grinding mill, [36] a grinding mill operated by a vertical waterwheel, [37] and a rolling mill operated by a horizontal waterwheel, the waterwheel placed in a rushing current found under a wooden deck that rotated the axle of the stone roller above within the interior of a building. [38]

Winnowing method of separating grain from chaff

Wind winnowing is an agricultural method developed by ancient cultures for separating grain from chaff. It is also used to remove hay and chaff or other pests from stored grain. Threshing, the loosening of grain or seeds from the husks and straw, is the step in the chaff-removal process that comes before winnowing.


Husk in botany is the outer shell or coating of a seed. It often refers to the leafy outer covering of an ear of maize (corn) as it grows on the plant. Literally, a husk or hull includes the protective outer covering of a seed, fruit, or vegetable. It can also refer to the exuvia of bugs or small animals left behind after moulting.

Trip hammer

A trip hammer, also known as a tilt hammer or helve hammer, is a massive powered hammer used in:


A two-masted Chinese junk ship, from the Tiangong Kaiwu. Tiangong Kaiwu Ship.jpg
A two-masted Chinese junk ship, from the Tiangong Kaiwu.

The subject of maritime and nautical technology and engineering was discussed extensively by Song Yingxing. Song noted that in northern China the chief means of transportation was by carriage and cart, while in southern China it was by ship and boat. [39] He provided various nuances about nautical matters, such as metal anchors for battleships and seagoing vessels weighing up to 30,000 catties. [40] [41] Song noted that there were thousands of names classifying different boats found in China, which was often named in accordance to their overall shape, cargo capacity, and quality (of material used and construction). [39] For example, he described the layout and construction of the grain tribute boat as a shallow, flat-bottom craft, with the preferred woods of cedar and chestnut being used to construct the bulkhead compartments of the hull. [42] Song also wrote of the methods used by the Chinese in his day for pearl diving in Guangdong. [43] Song wrote that these divers were able to stay underwater for prolonged periods of time since a secure rope was tied around their waists connected to the ship as they breathed through a long curving pipe that led up above the surface of the water. [43] This long breathing tube was strengthened by rings of tin and fastened to a watertight leather face mask. [43] A drawn illustration of this was provided in his book. [44]

In his admiration for the stern-mounted steering rudder (which had been known to the Chinese since at least the 1st century AD), [45] he wrote:

(Note: in this passage he speaks mostly of fresh-water ships at Poyang Lake and the Grand Canal .)

Sericulture and cotton

A giant draw loom machine for figure weaving, from the Tiangong Kaiwu. Tiangong Kaiwu Drawloom.jpg
A giant draw loom machine for figure weaving, from the Tiangong Kaiwu.

Song Yingxing opened his chapter on clothing with the aspects of sericulture in producing silk. He gave an accurate description of the raising of silkworms, along with their instinctual mating tradition. [47] Those raising the silkworms had their eggs deposited on sheets of paper or cloth, and stored for use in the following year. [47] He wrote that in some regions a bathing process was used on these sheets, employing rain water, lime water, or brine, and gave specifications on the timing for this during winter, in the 12th month of the year. [47] The reason for this, he said, was so that the inferior eggs would die in the process, hence less mulberry leaves would be consumed needlessly. [47] He also provided specifications on how to avoid damaging the eggs in the long process of preparation before the bathing process in the 12th month. [48] He noted the differences between two general forms of silkworms, late and early, while providing information on a wide variety in different silkworm breeds and cocoons, [49] and even silkworm diseases. [50] After their eventful hatching, he described the proper living conditions and environment that the silkworms should be immersed in, [51] as well as the care that should be given in feeding them. [52] He warned of different sources of foul odors and smoke that had the capability of killing the silkworms if they came into contact. [51] He described the spinning of cocoons, [53] gathering of cocoons, [53] sorting of cocoons, [54] and the different pests such as birds and mosquitoes that should be avoided, [55] He also described the proper planting of mulberry trees and how to harvest them. [56] For the process of making silk, he noted that raw silk could not be reeled into normal silk until a formal wadding process was done. [54] He described the reeling of silk fabric with a reeling machine, [57] the spooling of silk fibers, [58] the spinning of silk fibers into weft yarns, the silken threads drawn into a warp frame for weaving, [59] and the "ingenious" works of figure designing. [60] He also described the proper dimensions of different draw looms, [61]

Song Yingxing wrote that although silk was reserved for those with economic means, both rich and poor used cotton clothing during the winter. [62] In ancient times, he said, cotton was called xima ('nettle-hemp'). [62] He outlined two different types of cotton and their characteristics: tree cotton (Ceiba pentandra) and the cotton plant (Gossypium indicum). [62] He noted their planting in spring and their picking by autumn, as well as use of a cotton gin to separate cotton seeds that are naturally tightly fastened to fiber bolls of cotton. [63] He noted the process of straightening the cotton fibers with wooden boards, which prepared them for the spinning wheel, the "slivers drawn out to desired size and twisted into yarns." [62] After describing the weaving process of cotton and the different patterns used, he also described cotton padding during winter, in ancient times it was hemp padding, and that the rich could afford silk padding in their winter attire. [64] In addition to these he also described different fur, woolen, and felt clothing. [65]

Metallurgy, casting, and forging

Smelting silver ore and the process of removing lead compounds, from the Tiangong Kaiwu. Tiangong Kaiwu Silver Smelting & Refining.jpg
Smelting silver ore and the process of removing lead compounds, from the Tiangong Kaiwu.

In China, the 'five metals' were gold, silver, copper, iron, and tin, although the term could be extended in general terms to any sort of metal. [66] He wrote of how gold was held to be the most precious metal of them all, and that it could be obtained in the mountains, panned from river sand, and from underground mining. [67] He also outlined the different grades of gold and its malleable qualities. [67] To eliminate trace elements of other metals found in gold alloys, Song Yingxing outlined the use of a crucible technique. [68]

Song Yingxing wrote that ancient rulers of early China cast inscriptions of writing onto bronze tripods since this was a much more durable method of preserving the written record than using the perishable materials found in books and scrolls. [69] He noted that musical and announcing bells of higher quality were made of different copper alloys, while those of lesser quality were made of iron. [70] He also provided weighted formulas of different metal compositions for certain bells, for example, the casting a large bell in an audience hall or pavilion that required 47,000 catties of copper, 4,000 catties of tin, 50 oz. of gold, and 120 oz. of silver in its composition. [70] In the smelting process, long pits for the liquid metal flow had to be dug, having a drymold construction of lime and mortar that was dried and covered in ox fat and beeswax. [70] Then he noted the following process of pounded earth and charcoal powder that was screened and mixed into a mud paste that would be gradually spread on the surface of the wax several inches thick. [71] When dried and heated so that the melted fat and wax could flow out entirely by means of apertures at the base, the bell or tripod could be cast in the vacated cavity between the core and the mold. [71] With the individual casting process for bells and tripods, Song Yingxing also described the intricate individual casting processes for making cooking pots and pans, [72] metal statues, [72] metal barrels of cannons, [73] metallic mirrors, [73] and different metallic coins of copper or iron. [74] He described the processes of hammer forging with the initial casting of an anvil, [40] and noted that in the heating process of forging, coal accounted for 70% of the fuel, charcoal taking the rest at 30%. [40] He also outlined the quench-hardening process of rapid cooling in clear water immediately after iron and steel products were forged. [75] He outlined the different types of knives, axes, [75] hoes, [76] file tools, [76] awls, [77] saws, [77] wood chisels, [41] anchors, [41] and metal needles [78] that could be forged and produced. For the making of the finest swords, he said, they are coated with steel after "a hundred smeltings," but the core of the sword was still made of wrought iron; this was because a sword made entirely of steel would easily break when making hard strikes. [75]

Sulfur and saltpetre

There were many manufacturing processes described in the Tiangong Kaiwu. For example, for roasting iron pyrite in converting sulphide to oxide in sulfur used in gunpowder compositions, the book illustrated how ore was piled up with coal briquettes in an earthen furnace with a still-head that sent over sulfur as vapor that would solidify and crystallize. [79] For the preparation of saltpetre, Song Yingxing wrote:

Gunpowder weapons

Many of the gunpowder weapons that Song Yingxing described were similar to those in the Chinese Huolongjing of the earlier 14th century, although there are many noted differences between the two. For example, the Huolongjing described a land mine that was triggered by motion of the enemy above, with a pin release that let down falling weights which would use rope and axle to rotate a flint steel-wheel which in turn sent sparks onto a train of fuses for the mines. [82] It also described an explosive naval mine that was timed by a fuse and sent down river to an enemy ship. [83] However, it was the Tiangong Kaiwu of Song Yingxing that outlined the use of a rip-cord pulled from ambushers hidden on a nearby shore that would trigger the steel-wheel mechanism in producing sparks for the naval mine placed in the river or lake. [83] Song Yingxing also outlined the different types of metals that were preferable in casting different types of handguns and cannons. [84]

Song Yingxing described a 'match for ten thousand armies' bomb as follows:

The historian Needham notes that Song Yingxing must not have been much of a military man with extensive knowledge of martial matters, due to his enthusiasm for this archaic type of bomb that had been used by the Chinese since the Song Dynasty in the 12th century. [85] [86]


  1. Song, Yingxing (1637). "Tiangong Kaiwu" [The Exploitation of the Works of Nature]. World Digital Library (in Chinese). Jiangxi Sheng, China. Retrieved 28 May 2013.
  2. Needham, Volume 5, Part 7, 36.
  3. Song, xiv.
  4. 1 2 Needham, Volume 4, Part 2, 172.
  5. Brook, 20.
  6. Brook, 21.
  7. Cullen, Christopher (1990). "The Science/Technology Interface in Seventeenth-Century China: Song Yingxing 宋 應 星 on "qi" 氣 and the "wu xing" 五 行". Bulletin of the School of Oriental and African Studies, University of London. 53 (2): 295–318. doi:10.1017/S0041977X00026100. JSTOR   619236.
  8. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Needham, Volume 4, Part 2, 171-172
  9. Song, 3.
  10. Song, 3-4.
  11. Song, 3-31.
  12. Song, 5.
  13. Song, 7.
  14. Song, 9-10.
  15. Song, 13.
  16. Song, 15.
  17. Song, 16.
  18. Song, 17
  19. Song, 18.
  20. Song, 19.
  21. Song, 20-21.
  22. Song, 22.
  23. Song, 25.
  24. Song, 26.
  25. Song, 27.
  26. Song, 28.
  27. Song, 30.
  28. Song, 84
  29. Song, 85.
  30. Song, 87.
  31. Song, 88.
  32. Song, 89.
  33. Song, 91-92.
  34. Song, 93.
  35. Song, 96.
  36. Song, 98.
  37. Song, 99.
  38. Song, 103.
  39. 1 2 Song, 171.
  40. 1 2 3 Song 189.
  41. 1 2 3 Song, 196.
  42. Song, 172.
  43. 1 2 3 Needham, Volume 4, Part 3, 668.
  44. Needham, Volume 4, Part 3, 669.
  45. Needham, Volume 4, Part 3, 649-650.
  46. Needham, Volume 4, Part 3, 634.
  47. 1 2 3 4 Song, 36.
  48. Song, 36-37.
  49. Song, 37.
  50. Song, 41.
  51. 1 2 Song, 38.
  52. Song 39-41.
  53. 1 2 Song, 42.
  54. 1 2 Song, 48.
  55. Song, 42, 48.
  56. Song, 38-39.
  57. Song 48-49.
  58. Song, 49-50.
  59. Song, 50.
  60. Song, 56.
  61. Song, 55-56.
  62. 1 2 3 4 Song, 60.
  63. Song, 60-61.
  64. Song, 63.
  65. Song, 63-70.
  66. Song, 257.
  67. 1 2 Song, 236.
  68. Song, 237.
  69. Song, 159-160.
  70. 1 2 3 Song, 160.
  71. 1 2 Song 162.
  72. 1 2 Song, 163.
  73. 1 2 Song, 165.
  74. Song, 165-169.
  75. 1 2 3 Song, 190.
  76. 1 2 Song, 191.
  77. 1 2 Song, 192.
  78. Song, 196-197
  79. Needham, Volume 5, Part 7, 126.
  80. Needham, Volume 5, Part 7, 102-103.
  81. 1 2 Needham, Volume 5, Part 7, 103.
  82. Needham, Volume 5, Part 7, 199.
  83. 1 2 Needham, Volume 5, Part 7, 205.
  84. Needham, Volume 5, Part 7, 339 F.
  85. 1 2 Needham, Volume 5, Part 7, 187.
  86. Needham, Volume 5, Part 7, 166

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