IN 1975 -eight days ahead of time - the workers of the Kailuan Coal Mines in Tangshan fulfilled their promise to double their annual output of coal during the Fourth Five-Year Plan (1971-75). Their...
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IN 1975 -eight days ahead of time - the workers of the Kailuan Coal Mines in Tangshan fulfilled their promise to double their annual output of coal during the Fourth Five-Year Plan (1971-75). Their...