On June 17, 1967, China successfully exploded its first hydrogen bomb in western China. The explosive power is 150 times that of the A-bomb used by the United States in Hiroshima of Japan during the World War II. It marked a breakthrough in China's nuclear development, and indicated China's nuclear technology has entered a new era.
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It took the United States more than seven years from its first A-bomb test to its first hydrogen bomb test, the USSR, four years, and the UK, four and a half years. While in China, it only took two years and two months, a surprise to the entire world!