They made gunpowder. Then the American Civil War came. Billions, baby.
Military links carried over well into World War II, where e.g. they built the B Reactor.
Ciro Santilli
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中国独裁统治 China Dictatorship 新疆改造中心、六四事件、法轮功、郝海东、709大抓捕、2015巴拿马文件 邓家贵、低端人口、西藏骚乱