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NOTES RECEIVABLE (Details)	Jun. 28, 2024 CNY (¥)	Jun. 28, 2024 USD ($)	Dec. 31, 2023 CNY (¥)	Dec. 31, 2023 USD ($)	Jun. 30, 2023 CNY (¥)
NOTES RECEIVABLE
Notes receivable			¥ 12,532,717	$ 1,765,196	¥ 3,742,390
Subsequent event
NOTES RECEIVABLE
Notes receivable	¥ 12,500,000	$ 1,800,000
Percentage of notes subsequently collected	100.0	100.0

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Percentage of notes subsequently collected subsequently.

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Amortized cost, after allowance for credit loss, of financing receivable classified as current. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-9

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