Shāndōngshěng chūchǎn de sānyèchóng huàshí bèi chēngwéi biānfú shí.
Trilobite fossils from Shandong are known as 'bat stones'.
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China is a major source of trilobite fossils — the Chengjiang biota in Yunnan (UNESCO World Heritage) contains some of the oldest and best-preserved specimens in the world, dating back roughly 520 million years.
