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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Deferred tax liabilities
Deferred tax assets:
Impairment on property, plant and equipment		2,907,548
Impairment on prepaid land lease	877,244	883,884
Exploration costs	1,919,666	1,908,087
Compensation costs of unexercised stock options	1,614	74,883
Miscellaneous	(77,241)
PRC tax losses	23,352,679	21,643,028
US federal net operating loss	1,267,960	1,045,503
Total deferred tax assets	27,341,922	28,462,933
Valuation allowance	(9,943,998)	(9,872,706)
Net deferred tax asset	$ 17,397,924	$ 18,590,227

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