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Segment Information - Schedule of Identifiable Long-Lived Assets, Net (Details)	Jun. 30, 2025 CNY (¥)	Jun. 30, 2025 USD ($)	Dec. 31, 2024 CNY (¥)
Identifiable long-lived assets, net:
Total identifiable long-lived assets, net	¥ 2,328,617	$ 325,062	¥ 955,974
IT Related Solution Services [Member]
Identifiable long-lived assets, net:
Total identifiable long-lived assets, net	2,328,617		955,974
Educational content service and other services [Member]
Identifiable long-lived assets, net:
Total identifiable long-lived assets, net

X

- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483154/926-20-50-5

+ Details

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Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=jz_EducationalContentServiceAndOtherServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: