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ADVANCES TO SUPPLIERS (Details)	Dec. 31, 2022 CNY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 CNY (¥)
Advances to suppliers
Advances to suppliers	¥ 30,345	$ 4,400	¥ 2,781,139
Other
Advances to suppliers
Advances to suppliers	¥ 30,345	$ 4,400	¥ 2,781,139

X

- Definition

The amount of carrying value of capitalized payments made in advance that is expected to be received within one year or the normal operating cycle, if longer.

+ References

No definition available.

+ Details

Name:	ncty_AdvancesToSuppliersCurrent
Namespace Prefix:	ncty_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Advances to Suppliers [Line Items]

+ References

No definition available.

+ Details

Name:	ncty_AdvancesToSuppliersLineItems
Namespace Prefix:	ncty_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_NatureOfExpenseAxis=ncty_OthersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: