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Related Party Transactions (Details) - Schedule of Related Party	12 Months Ended
	Dec. 31, 2023
Related Party Transaction [Line Items]
Nature of Relationship	Nature of Relationship
Jianping Kong [Member]
Related Party Transaction [Line Items]
Nature of Relationship	Principal shareholder, chairman and chief executive officer
Qifeng Sun [Member]
Related Party Transaction [Line Items]
Nature of Relationship	Principal shareholder and vice chairman
Hangzhou Weiditu Technology Co., Ltd. [Member]
Related Party Transaction [Line Items]
Nature of Relationship	Company controlled by Jianping Kong

X

- Definition

This element represents a description of the nature of common ownership or management control relationships with other entities, regardless of there being transactions between the entities, when the existence of that control could result in operating results or financial position of the reporting entity significantly different from that which would have been obtained if the entities' were autonomous.

+ References

No definition available.

+ Details

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

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(i))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(ii))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(g)(3))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

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- Details

Name:	us-gaap_RelatedPartyTransactionAxis=ck0001872302_JianpingKongMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=ck0001872302_QifengSunMember
Namespace Prefix:
Data Type:	na
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Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=ck0001872302_HangzhouWeidituTechnologyCoLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
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