XML 39 R30.htm IDEA: XBRL DOCUMENT v3.22.4

Summary of significant accounting policies (Tables)

6 Months Ended

Jun. 30, 2022

Summary of significant accounting policies

Schedule of estimated useful lives for significant property and equipment

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​	​	​
Buildings		20 years
Machinery and equipment		5 - 10 years
Transportation equipment		4 - 5 years
Office equipment		4 - 5 years
Electronic equipment		3 - 5 years

Schedule of estimated useful lives of intangible assets

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​	​	​
​		Estimated Useful Life
Licenses and permits		Indefinite
Software		5 - 10 years
Land use right		50 years
Patents		10 years

Schedule of currency exchange rates that were used in creating the consolidated financial statements

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Six months ended June 30, 2022

Six months ended June 30, 2021

December 31, 2021

US$:RMB exchange rate

Period End

$

0.1493

Period End

$

0.1549

Period End

$

0.1569

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​

Average

​

$

0.1543

​

Average

​

$

0.1546

​

Average

​

$

0.1550

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- Definition

Tabular disclosure of the U.S. dollar denominated balances, balances reported for financial reporting purposes and the differences between the two balances by each relevant line item on the financial statements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section S99
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521

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Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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