China Unicom Hong Kong : 2017 Annual Report on Form 20-F Filed with the SEC

To: Business/Finance Editors (For Immediate Release)

CHINA UNICOM (HONG KONG) LIMITED

2017 ANNUAL REPORT ON FORM 20-F FILED WITH THE SEC

Hong Kong, 20 April 2018 - China Unicom (Hong Kong) Limited and its subsidiaries ("China Unicom" or "the Company" and "the Group") (HKEx: 0762; NYSE: CHU)announced that the Company has filed its Annual Report on Form 20-F for the year ended December 31, 2017 (the "2017 Form 20-F") with the U.S. Securities and Exchange Commission (the "SEC").

The 2017 Form 20-F is available on the Investor Relations section of the Company's website athttp://www.chinaunicom.com.hkand on the SEC's website athttps://www.sec.gov. Shareholders may also request a hard copy of the Company's complete audited financial statements, free of charge, by contacting the Company at Investor Relations Department:

China Unicom (Hong Kong) Limited

Tel: +852 2126 2018

Fax: +852 2126 2016

Email:ir@chinaunicom.com.hk

Address: 75/F, The Center, 99 Queen's Road Central, Hong Kong

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For media enquiries, please contact:

China Unicom (Hong Kong) Limited

Mr. Ivan Wong / Ms. Joeling Law / Mr. Billy Tang

Tel: (852) 2121 3210 / (852) 2121 3225 / (852) 2121 3275

Email:ivanw@chinaunicom.com.hk/ joeling.law@chinaunicom.com.hk/billy@chinaunicom.com.hk