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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Statutory Reserves (Details) - CNY (¥)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Percentage of after tax profit, transferred annually by PRC subsidiaries to statutory surplus fund	10.00%
Maximum percentage criteria for appropriation of after-tax profit of PRC subsidiaries to statutory surplus fund (as a percent)	50.00%
Appropriations to statutory reserves	¥ 0	¥ 42,654	¥ 20,875,864

X

- Definition

The percentage of after tax profits appropriated to statutory surplus fund annually.

+ References

No definition available.

+ Details

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Period Type:	instant

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- Definition

The amount appropriated to statutory reserves.

+ References

No definition available.

+ Details

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Namespace Prefix:	niu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents the maximum percentage criteria expressed as a percentage of registered capital for the transfer of after-tax profit by subsidiaries in China to a statutory surplus fund. If the reserve fund exceeds the specified threshold of the registered capital, further appropriation is not required.

+ References

No definition available.

+ Details

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Namespace Prefix:	niu_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

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