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Sky Ladder: The Art of Cai Guo-Qiang is a 2016 documentary film directed by Kevin Macdonald about the life and work of Cai Guo-Qiang known for his artwork with the help of gunpowder. [1] The film was released by Netflix on October 14, 2016.
The History of Jin describes the bombs thus: "The heaven-shaking-thunder bomb is an iron vessel filled with gunpowder. When lighted with fire and shot off, it goes off like a crash of thunder that can be heard for a hundred li [thirty miles], burning an expanse of land more than half a mu [所爇圍半畝之上, a mu is a sixth of an acre], and ...
Earliest known written formula for gunpowder, from the Wujing Zongyao of 1044 AD.. Gunpowder is the first explosive to have been developed. Popularly listed as one of the "Four Great Inventions" of China, it was invented during the late Tang dynasty (9th century) while the earliest recorded chemical formula for gunpowder dates to the Song dynasty (11th century).
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The Wanggongchang Armory was located about 3 kilometres (1.9 miles) southwest of the Forbidden City, in modern-day central Xicheng District.It was one of the six gunpowder factories administered by the Ministry of Works in the Beijing area, and also one of the main storage facilities of armor, firearms, bows, ammunition, and gunpowder for the Shenjiying defending the capital.
These new siege weapons had the capability of throwing larger missiles further than the previous traction trebuchets. One account records, "when the machinery went off the noise shook heaven and earth; every thing that [the missile] hit was broken and destroyed." [50] The fortress city of Xiangyang fell in 1273. [15]
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