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ORDINARY SHARES PURCHASE WARRANTS ISSUED TO INVESTORS - Measurement inputs (Details)	Dec. 31, 2021 ¥ / shares	Jun. 30, 2021 ¥ / shares	Jun. 14, 2021 ¥ / shares	Jun. 26, 2020	May 21, 2020
Stock price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants outstanding, measurement input	1.31	4.33	5.01
Risk-free interest rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants outstanding, measurement input	1.25	0.95	0.90	0.35	0.40
Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants outstanding, measurement input	109	111	111	104.26	99.50
Exercise price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants outstanding, measurement input	6.24	6.24	6.24
Warrant life
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants outstanding, measurement input	5.0	5.5	5.5

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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