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Property, plant and equipment, net (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Property, plant and equipment, net (Details) [Line Items]
Term of lease, description	As of March 31, 2023 and December 31, 2022, land use rights represented twenty three parcels of state-owned lands located in Xushui District and Wei County of Hebei Province in China, with lease terms of 50 years expiring in 2061 and 2068, respectively.
Property, plant and equipment net value	$ 93,136
Land use right net values	4,334,537		$ 4,301,204
Value of land use right pledged for bank loan	3,976,123		3,948,953
Land use right	5,396,364
Depreciation and amortization	$ 3,686,243	$ 3,773,236
Dongfang Paper [Member]
Property, plant and equipment, net (Details) [Line Items]
Property, plant and equipment net value			$ 280,466
Hebei Tengsheng [Member]
Property, plant and equipment, net (Details) [Line Items]
Land use right net value	$5,150,283		$5,111,014

X

- Definition

The carrying amount, as of the date of the latest financial statement presented, of other assets which are owned but transferred to serve as collateral for the payment of the related debt obligation, primarily a secured borrowing or repurchase agreement, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.

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Property plant and equipment loan drawn from banking facility.

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Value of land use right pledged for sale leaseback financing.

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A description of how an entity determined the fair value of the long-lived asset being disposed of by a method other than sale, for example, whether based on a quoted market price, prices for similar assets, or another valuation technique.

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Amount of expense charged against earnings to allocate the cost of tangible and intangible assets over their remaining economic lives, classified as other.

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The cash outflow for acquisition of land for use; excludes purchases of land held as inventory or as investments.

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