On August 26, 2001, the State Postal Bureau issued a set of four stamps picturing the Datong River Diversion Project.The Datong River Diversion Project is a large-scale water conservancy project that...
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On August 26, 2001, the State Postal Bureau issued a set of four stamps picturing the Datong River Diversion Project.The Datong River Diversion Project is a large-scale water conservancy project that...