SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16

of the Securities Exchange Act of 1934

For the Month of October 2018

Commission File Number 1-15028

China Unicom (Hong Kong) Limited

(Exact Name of Registrant as Specified in Its Charter)

75/F, The Center,

99 Queen’s Road Central, Hong Kong

(Address of 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.)

(Indicate by check mark if the registrant is submitting the Form 6-K on paper as permitted by Regulation S-T Rule 101(b)(1):  ☐.)

(Indicate by check mark if the registrant is submitting the Form 6-K on paper as permitted by Regulation S-T Rule 101(b)(7):  ☐.)

(Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.)

(If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b):82-            .)

EXHIBITS

FORWARD-LOOKING STATEMENTS

This announcement contains certain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Such forward-looking statements may include, without limitation, statements relating to (i) the Company’s plans and strategies and the ability to successfully execute these plans and strategies, including those in connection with mergers and acquisitions and capital expenditures; (ii) the Company’s plans for network expansion, including those in connection with the build-out of mobile services and network infrastructure; (iii) the Company’s competitive position, including the ability to upgrade and expand existing networks and increase network efficiency, to improve existing services and offer new services, to develop new technological applications and to leverage the Company’s position as an integrated telecommunications operator and expand into new services and markets; (iv) the Company’s future business condition, including future financial results, cash flows, financing plans and dividends; (v) the future growth of market demand of, and opportunities for, the Company’s new and existing products and services; and (vi) future regulatory and other developments in the PRC telecommunications industry.

The words “anticipate”, “believe”, “could”, “estimate”, “intend”, “may”, “seek”, “will” and similar expressions, as they relate to the Company, are intended to identify certain of these forward-looking statements. The Company does not intend to update any of these forward-looking statements and are under no obligation to do so.

The forward-looking statements contained in this announcement are, by their nature, subject to significant risks and uncertainties. In addition, these forward-looking statements reflect the Company’s current views with respect to future events and are not a guarantee of the Company’s future performance. Actual results may differ materially from those expressed or implied in the forward-looking statements as a result of a number of factors, including, without limitation:

Please also see the “Risk Factors” section of the Company’s latest Annual Report on Form 20-F, as filed with the U.S. Securities and Exchange Commission.

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.

Exhibit 1

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.

(Incorporated in Hong Kong with limited liability)

(Stock Code: 0762)

China United Network Communications Corporation Limited Openly Recruits Contract-out

Operational Partners for China Unicom Yunnan

This announcement is made by China Unicom (Hong Kong) Limited (the “Company”) pursuant to Rule 13.09 of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited and the Inside Information Provisions under Part XIVA of the Securities and Futures Ordinance (Chapter 571 of the Laws of Hong Kong).

The Company actively explores ways to reform the system and mechanism of its subsidiaries, so as to lift the vibrancy of the organisation and employees. As approved by the Office of State-owned Enterprise Reform Leading Group under the State Council, the Yunnan Branch of China United Network Communications Corporation Limited (“China Unicom Yunnan”), a branch company of China United Network Communications Corporation Limited (“CUCL”), which is a wholly-owned subsidiary of the Company, has been officially included in the list of “Double-hundred Action” (「雙百行動」) in relation to the reform of state-owned enterprises. Pursuant to the comprehensive reform plan of “Double-hundred Action” of China Unicom Yunnan, CUCL will start to openly recruit private-owned enterprises to become contract-out operational partners for China Unicom Yunnan.

In the meantime, shareholders and investors of the Company are advised to exercise caution in dealing in the securities of the Company.

By Order of the Board

CHINA UNICOM (HONG KONG) LIMITED

WANG XIAOCHU

Chairman and Chief Executive Officer

Hong Kong, 28 October 2018

1

As at the date of this announcement, the board of directors of the Company comprises:

2