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Property, Plant and Equipment, Net - Schedule of Property, Plant and Equipment (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
At cost:
Mineral rights	$ 2,973,716	$ 2,955,780
Buildings	34,075,173	64,024,667
Plant and machinery	236,574,630	258,400,710
Motor vehicles	137,196	6,553
Furniture, fixtures and office equipment	2,452,098	3,318,564
Construction in process	24,696,439	12,095,565
Total	300,909,252	340,801,839
Less: Accumulated depreciation and amortization	(150,495,205)	(173,212,554)
Impairment	0	(18,641,596)
Net book value	$ 150,414,047	$ 148,947,689

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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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