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v3.23.1

Property, Plant and Equipment, Net - Schedule of Property, Plant and Equipment (Details) - USD ($) | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
At cost: |  |
Mineral rights | $ 2,806,506 | $ 2,769,091
Buildings | 31,929,577 | 31,503,908
Plant and machinery | 188,484,948 | 185,972,160
Motor vehicles | 126,986 | 125,293
Furniture, fixtures and office equipment | 2,312,075 | 2,281,251
Construction in process | 10,623,600 | 11,356,546
Total | 236,283,692 | 234,008,249
Less: Accumulated depreciation and amortization | (90,567,121) | (84,091,483)
Impairment | 0 | 0
Net book value | $ 145,716,571 | $ 149,916,766

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