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Income Taxes (Details)	6 Months Ended
	Jun. 30, 2025 CNY (¥)
Income Taxes [Abstract]
Underpayment of taxes	¥ 100

X

- Definition

The amount of underpayment of taxes.

+ References

No definition available.

+ Details

Name:	jz_UnderpaymentOfTaxes
Namespace Prefix:	jz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration