USSR's Secret Spacecraft Falls into China's Hands
TL;DR
In 1969, a Soviet lunar mission went awry when a rocket malfunction caused a highly classified spacecraft to land in China, a geopolitical adversary. The L1E spacecraft, intended for lunar exploration, was equipped with a descent module that survived reentry and landed intact near Harbin, China. This incident occurred during a period of tense Soviet-Chinese relations, following a border conflict earlier that year. The spacecraft's unintended delivery provided a significant technological boost to China's nascent space program, which was rapidly advancing towards its own satellite launches and crewed missions.
USSR inadvertently gifts its secret spacecraft to hostile China RussianSpaceWeb.com
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