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Deferred Tax, Net (Details) - Schedule of deferred tax assets - USD ($)	Sep. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of deferred tax assets [Abstract]
Accrued expenses	$ 70,446	$ 70,019	$ 189,050
Write-off Erdos TCH net investment in sales-type leases	6,352,124	6,155,300	6,349,604
US NOL	415,851	254,035	3,246,655
PRC NOL	2,623,801	10,849,690	10,424,558
Total deferred tax assets	9,462,222	17,329,044
Less: valuation allowance for deferred tax assets	(9,462,222)	(17,329,044)	$ (24,854,272)
Deferred tax assets, net

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Deferred tax asset noncurrent net operating loss.

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Write-off Erdos TCH net investment in sales-type leases.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
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-Publisher FASB
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-Section 50
-Paragraph 6
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities.

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