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ACCOUNTS RECEIVABLE, NET - Movement of allowance for doubtful accounts (Details)	6 Months Ended			12 Months Ended
	Dec. 31, 2024 CNY (¥)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 CNY (¥)	Jun. 30, 2024 CNY (¥)
ACCOUNTS RECEIVABLE, NET
Charge to (reversal of) credit losses	¥ 1,614,507	$ (221,187)	¥ 1,051,564
Third Parties
ACCOUNTS RECEIVABLE, NET
Beginning balance	1,968,461	269,678	¥ 995,449	¥ 995,449
Charge to (reversal of) credit losses	1,614,507	221,187		973,012
Foreign currency translation adjustments	0	0
Ending balance	¥ 3,582,968	$ 490,865		¥ 1,968,461

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- Definition

Amount of expense (reversal of expense) for expected credit loss on accounts receivable due from third parties.

+ References

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Amount of allowance for credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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