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Statutory Reserves (Details) | 12 Months Ended
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Dec. 31, 2023 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 USD ($)
Statutory Reserves [Line Items] |  |  |
Percentage of income tax rate | 10.00% |  |
Percentage of reserve capital | 50.00% |  |
Statutory reserve |  | ¥ 6,647,109 |

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- Definition Percentage of reserve capital. + References No definition available. + Details
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Namespace Prefix: | ck0001872302_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of statutory reserve. + References No definition available. + Details
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Namespace Prefix: | ck0001872302_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | ck0001872302_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 + Details
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