The board of directors of ISDN Holdings Limited announces that Ms. Cheng Lucy ("Ms. Cheng") has resigned as a joint company secretary of the Company with effect from 28 February 2020. Following the resignation of Ms. Cheng, Ms. Tung Wing Yee Winnie ("Ms. Tung"), who meets the requirements of a company secretary under Rule 3.28 of the Rules Governing the Listing of Securities on the Stock Exchange, has been nominated by Boardroom Corporate Services Limited to act as the one of the joint company secretaries of the Company with effect from 28 February 2020.