Telecom Service One : Change of Principal Place of Business in Hong Kong

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Telecom Service One Holdings Limited

電 訊 首 科 控 股 有 限 公 司

(Incorporated in the Cayman Islands with limited liability)

(Stock Code: 3997)

CHANGE OF PRINCIPAL PLACE OF BUSINESS IN HONG KONG

The board of directors (the "Board") of Telecom Service One Holdings Limited (the "Company") hereby announces that the principal place of business of the Company in Hong Kong will be changed to Portion B of Unit 1806 and Unit 1807, 18/F, Riley House, 88 Lei Muk Road, Kwai Chung, New Territories, Hong Kong with effect from 18 April 2019. The telephone number and facsimile number of the Company will remain unchanged.

By Order of the Board

Telecom Service One Holdings Limited

Cheung King Shek

Chairman

Hong Kong, 18 April 2019

As at the date of this announcement, the chairman and non-executive director of the Company is Mr. Cheung King Shek; the chief executive officer and executive director of the Company is Mr. Cheung King Fung Sunny; the non-executive directors of the Company are Mr. Cheung King Shan and Mr. Cheung King Chuen Bobby; and the independent non-executive directors of the Company are Mr. Fong Ping, Ms. Kwok Yuen Man Marisa and Mr. Tso Ka Yi.