6-K

UNITEDSTATES

SECURITIESAND EXCHANGE COMMISSION

Washington,D.C. 20549

FORM6-K

REPORTOF FOREIGN PRIVATE ISSUER

PURSUANTTO RULE 13a-16 OR 15d-16

UNDERTHE SECURITIES EXCHANGE ACT OF 1934

Forthe month of July 2025

CommissionFile Number: 001-42683

Julong Holding Limited

(Exact name of registrant as specified in its charter)

Room2009, Building A, Times Fortune World

No.1Hangfeng Road, Fengtai District

Beijing,China 100070

(Addressof principal executive offices)

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

ExhibitsIndex

SIGNATURES

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

Date: July 2, 2025

Exhibit 99.1

JulongHolding Limited Announces Full Exercise of Over-Allotment Option

BEIJING, July 2, 2025 – Julong Holding Limited (“Julong” or the “Company”) (Nasdaq: JLHL), a growth-oriented provider of intelligent integrated solutions, today announced that, in connection with its previously completed initial public offering (the “Offering”) of its Class A ordinary shares, the underwriter has exercised its over-allotment option in full to purchase an additional 187,500 Class A ordinary shares at the public offering price from the Company, bringing additional gross proceeds of US$750,000 to the Company before deducting underwriting discounts and commissions. The issuance of additional Class A ordinary shares closed on July 2, 2025.

US Tiger Securities, Inc. acted as the sole book-runner for the Offering.

A registration statement related to these securities has been filed with, and declared effective by, the United States Securities and Exchange Commission. This press release shall not constitute an offer to sell or a solicitation of an offer to buy any of the securities described herein, nor shall there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

This offering is being made only by means of a prospectus forming part of the effective registration statement. The final prospectus relating to the Offering was filed with the SEC and is available on the SEC’s website at www.sec.gov. Copies of the final prospectus relating to the Offering may be obtained, when available, by contacting US Tiger Securities, Inc. at 437 Madison Avenue, 27th Floor, New York, NY 10022, United States, or by telephone at +1-646-978-5188, or by email at [email protected].

AboutJulong

Founded in 1997, Julong is a growth-oriented professional provider of intelligent integrated solutions to public utilities, commercial properties, and multifamily residential properties operating at scale in China. The Company’s comprehensive suite of intelligent integrated solutions includes systems for intelligent security, fire protection, parking, toll collection, broadcasting, identification, data room, emergency command, and city management. Since its inception, Julong has focused on the successful and on-time execution of complex projects, through its “deliveries before deadline” and “customers first” initiatives. As Julong continues to cross-sell its service and solution offerings and advance its purpose-built technologies, the Company is well-positioned to achieve economies of scale and capture future opportunities.

For more information, please visit: ir.julongzx.com.

Forward-LookingStatements

Thispress release contains statements that may constitute “forward-looking” statements which are made pursuant to the “safeharbor” provisions of the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements include, butare not limited to, statements relating to the anticipated size of the initial public offering and the expected trading commencementand closing dates. These forward-looking statements can be identified by terminology such as “will,” “would,”“may,” “expects,” “anticipates,” “aims,” “future,” “continues,”“could,” “should,” “target,” “intends,” “plans,” “believes,”“estimates,” “likely to,” and similar expressions. Statements that are not historical facts, including statementsabout the Company’s beliefs, plans, and expectations, are forward-looking statements. Forward-looking statements involve inherentrisks and uncertainties. Actual results may differ materially from those indicated by such forward-looking statements as a result ofvarious important factors, including: uncertainties related to market conditions, the satisfaction of customary closing conditions relatedto the initial public offering, the completion of the initial public offering on the anticipated terms, or at all, and other factorsdiscussed in the “Risk Factors” section of the preliminary and final prospectus that forms a part of the effective registrationstatement filed with the Securities and Exchange Commission. All information provided in this press release is as of the date of thispress release, and the Company does not undertake any obligation to update any forward-looking statement, except as required under applicablelaw.

Forinvestor and media inquiries, please contact:

In China:

InvestorRelations:

Email: [email protected]

The Piacente Group, Inc.

Jenny Cai

Tel: +86 (10) 6508-0677

Email: [email protected]

In the United States:

The Piacente Group, Inc.

Brandi Piacente

Tel: +1-212-481-2050

Email: [email protected]