The Song Dynasty's Lost Policy: The Ever-Normal Granary

The Song Dynasty's Lost Mathematician: Qin Jiushao's Mathematical Treatise in Nine Sections

In this episode, Lucas and Luna explore the life and work of Qin Jiushao, a 13th-century Song mathematician who wrote the 'Mathematical Treatise in Nine Sections' (Shu Shu Jiu Zhang). Qin developed the Chinese remainder theorem for solving systems of congruences and Horner's method for polynomial equations centuries before European mathematicians. They discuss his controversial career as a military official during the Mongol invasions, his innovations like the tian yuan shu (method of the celestial unknown), and how Song mathematics blended practical problems from astronomy, trade, and engineering with abstract theory. The episode also touches on the social status of mathematicians in Song China, the role of the civil service exams, and how Qin's work was preserved despite the fall of the Song dynasty. Discover a lost genius whose insights anticipated modern algebra. #QinJiushao #ShuShuJiuZhang #SongMathematics #ChineseRemainderTheorem #HornerMethod #TianYuanShu #SongDynasty #AncientMath #AlgebraHistory #MongolInvasions #13thCentury #ChineseHistory #FexingoHistory #History #Mathematics #ScienceHistory #EastAsia #LostGenius Keep every episode free: buymeacoffee.com/fexingo [https://buymeacoffee.com/fexingo]

The Song Dynasty's Lost Defender: Xin Qiji's Military Genius

The Song Dynasty produced some of China's greatest poets, but few were also battlefield commanders. In this episode, Lucas and Luna explore the life of Xin Qiji (1140-1207), a Southern Song general and poet who fought to reclaim the north from the Jurchen Jin dynasty. Born in Jin-occupied territory, Xin crossed enemy lines as a teenager to lead a rebellion, later serving in the Song military while pouring his patriotic grief into some of the most powerful ci poetry in Chinese literature. We discuss his dramatic early life, his famous raid to capture the traitor Zhang Anguo, his controversial policies on military colonies and tax reform, and why his writing—like 'Breaking Encirclements at the Eagle Camp' and 'The Top of the City Wall'—remains a testament to unrealized ambition. We also touch on his clashes with the pacifist court of Song Ningzong, the failed Kaixi北伐, and his posthumous reputation as both a literary giant and a military thinker whose ideas might have changed history. 28-40 turns, 6-8 minutes. #XinQiji #SongDynasty #History #ChinesePoetry #MilitaryHistory #JinDynasty #SouthernSong #CiPoetry #KaixiNorthernExpedition #ZhangAnguo #SongNingzong #ChenLiang #Zhuzhuang #Jiazhou #PatrioticPoetry #FexingoHistory #EastAsia #MedievalChina Keep every episode free: buymeacoffee.com/fexingo [https://buymeacoffee.com/fexingo]

The Song Dynasty's Lost Gunpowder Weapons: Bombs and Grenades

In this episode, Lucas and Luna explore the Song Dynasty's development of explosive gunpowder weapons beyond the fire lance. They discuss the first cast-iron bombshells, the thunderclap bomb (zhen tian lei), and the use of gunpowder grenades in the defense of cities like Kaifeng and Xiangyang. The conversation covers the shift from incendiary to explosive gunpowder, the role of the Song military in innovation, and the eventual loss of these technologies to the Mongols and later dynasties. Specific figures like Chen Gui and his 'fire cannon' manual, and battles such as the siege of Caishi, are highlighted. #SongDynasty #Gunpowder #ZhenTianLei #FireLance #Bombshells #SiegeOfXiangyang #Caishi #ChenGui #WujingZongyao #Huopao #CastIron #Mongols #ChineseMilitaryHistory #Engineering #Explosives #MedievalTechnology #History #FexingoHistory Keep every episode free: buymeacoffee.com/fexingo [https://buymeacoffee.com/fexingo]

Su Song's Cosmic Clock and the Song Dynasty's Lost Engineer

In this episode, Lucas and Luna return to the towering figure of Su Song—the Song dynasty polymath who built a 12-meter astronomical clock tower in Kaifeng around 1090. They explore how Su Song's Xin Yi Xiang Fa Yao (New Design for an Armillary Clock) described an escapement mechanism and a chain drive centuries before they appeared in Europe. The conversation touches on the clock's water-wheel power, its rotating armillary sphere and celestial globe, and the bureaucratic and technical challenges Su Song faced. They also consider why this engineering marvel was dismantled by the Jin invaders and why its principles were not revived for centuries. Along the way, they connect Su Song's work to earlier Song innovations in timekeeping and astronomy, and reflect on what the loss of such knowledge means for our understanding of medieval Chinese science. #SuSong #SongDynasty #CosmicClock #XinYiXiangFaYao #Kaifeng #Astronomy #HistoryOfScience #Escapement #ChainDrive #ArmillarySphere #CelestialGlobe #WaterClock #BencaoTujing #SongZhezong #ChineseInvention #MedievalChina #History #FexingoHistory Keep every episode free: buymeacoffee.com/fexingo [https://buymeacoffee.com/fexingo]

Song Dynasty's Lost Architect: Li Jie and the Building Standards

After covering the Song Dynasty's paper money, reforms, gunpowder, maps, hydraulic engineering, forensic science, maritime trade, star charts, compass, printing, and more, this episode turns to something equally groundbreaking but often overlooked: the first known comprehensive building code in Chinese history. We explore the life and work of Li Jie, the Song Dynasty's master architect, who compiled the Yingzao Fashi (Treatise on Architectural Methods) in 1103 under Emperor Huizong. This illustrated manual standardized everything from bracketing systems and roof slopes to material ratios and labor costs. We discuss how Li Jie's work codified the dougong (interlocking bracket sets), the modular cai-fen system, and how these standards enabled the rapid construction of temples, palaces, and government buildings across the empire. We also touch on the political and economic context: the corruption and inefficiency that plagued earlier projects, and how Huizong's ambitions for grand palaces and Daoist temples drove the need for regulation. Finally, we consider the legacy of the Yingzao Fashi, which survived the fall of the Song and influenced later dynasties, and its rediscovery in the 20th century by scholars like Liang Sicheng. #SongDynasty #LiJie #YingzaoFashi #ChineseArchitecture #BuildingCode #Dougong #CaiFenSystem #EmperorHuizong #TimberFrame #ArchitecturalHistory #Kaifeng #SongHuizong #LiangSicheng #Carpentry #ModularDesign #EastAsianHistory #History #FexingoHistory Keep every episode free: buymeacoffee.com/fexingo [https://buymeacoffee.com/fexingo]