Taian City in Shandong Province stands at the heart of an area rich in mineral resources. Already reserves of 51 varieties have been verified, 18 of which have a potential value of 772.6 billion yuan...
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Taian City in Shandong Province stands at the heart of an area rich in mineral resources. Already reserves of 51 varieties have been verified, 18 of which have a potential value of 772.6 billion yuan...