UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANTTO RULE 13a-16 OR 15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the month of July 2025

Commission File Number: 001-41426

Nano Labs Ltd

(Exact name of registrant as specified in its charter)

China Yuangu Hanggang Technology Building

509 Qianjiang Road, Shangcheng District,

Hangzhou, Zhejiang, 310000

People’s Republic of China

(Address of principal executive office)

Indicate by check mark whether the registrantfiles or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒         Form40-F ☐

EXPLANATORY NOTE

Thedocument attached as Exhibit 99.1 to this report on Form 6-K is hereby incorporated by referenceinto the Company’s Registration Statement on Form F-3, as amended, initially filed with the U.S. Securities andExchange Commission on August 14, 2023 (Registration No. 333-273968) andshall be a part thereof from the date on which this current report is furnished, to the extent not superseded by documents or reportssubsequently filed or furnished.

SIGNATURES

Pursuant to the requirementsof the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereuntoduly authorized.

EXHIBIT INDEX

3

Exhibit 99.1

Nano Labs Further Increases BNB Holdings to128,000 Tokens, Expanding Strategic
Reserve to Over US$100 Million and Upgrading BNB Reserve Strategy

HONGKONG, July 28, 2025 (GLOBE NEWSWIRE) – Nano Labs Ltd (Nasdaq: NA)(“we,” the“Company” or“Nano Labs”),a leading Web 3.0 infrastructure and product solution provider in China, today announced a significant increase of its BNB holdings to128,000 tokens. Based on the current market price of US$850 per BNB, the total value of the Company’sBNB strategic reserve now exceeds US$108 million. This marks the latest advancement in Nano Labs’ long-term BNB reserve strategy.

The Company recently acquired an additional 8,000BNB tokens through an over-the-counter (OTC) transaction at an average purchase price of approximately US$801 per token. As of the dateof this announcement, Nano Labs holds approximately 128,000 BNB tokens in total, with an average acquisition cost of US$713 per token.Based on the current market price, the total market value of these holdings is approximately US$108 million.

Looking ahead, Nano Labs plans to further strengthenits strategic position within the BNB ecosystem through a multi-pronged approach. This includes continued BNB accumulation, acquiringcontrolling interests in companies focused exclusively on BNB reserves, and investing in leading BNB-centric enterprises.

About Nano Labs Ltd

Nano Labs Ltd is a leading Web 3.0 infrastructureand product solution provider in China. Nano Labs is committed to the development of high throughput computing (“HTC”) chipsand high performance computing (“HPC”) chips. Nano Labs has built a comprehensive flow processing unit (“FPU”)architecture which offers solution that integrates the features of both HTC and HPC. In addition, Nano Labs has actively positioned itselfin the digital assets space, adopting BNB as its primary reserve asset. It has reserved in mainstream digital currencies including BNBand BTC, and established an integrated platform covering multiple business verticals, including HTC solutions and HPC solutions*. Formore information, please visit the Company’s website at: ir.nano.cn.

*  According to an industry report preparedby Frost & Sullivan.

Forward-Looking Statements

This press release contains forward-lookingstatements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended, and as defined in theU.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements include, without limitation, the Company’splan to appeal the Staff’s determination, which can be identified by terminology such as “may,” “will,”“expect,” “anticipate,” “aim,” “estimate,” “intend,” “plan,” “believe,”“potential,” “continue,” “is/are likely to” or other similar expressions. Such statements are basedupon management’s current expectations and current market and operating conditions, and relate to events that involve known or unknownrisks, uncertainties and other factors, all of which are difficult to predict and many of which are beyond the Company’s control,which may cause the Company’s actual results, performance or achievements to differ materially from those in the forward-lookingstatements. Further information regarding these and other risks, uncertainties or factors is included in the Company’s filings withthe Securities and Exchange Commission. The Company does not undertake any obligation to update any forward-looking statement as a resultof new information, future events or otherwise, except as required under law.

For investor inquiries, please contact:

NanoLabs Ltd

ir@nano.cn

Ascent Investor Relations LLC

Tina Xiao

Phone: +1-646-932-7242

Email: investors@ascent-ir.com