TST: Notice of record date for Annual General Meeting of Shareholders of fiscal year 2023

1. Issuer: Telecommunication Technical Service Joint Stock Company
2. Stock code: TST
3. Par value: VND10,000/share
4. Record date: 09/06/2025
5. Ex-date: 06/06/2025
6. Reason:
     * Annual General Meeting of Shareholders of fiscal year 2023
          - Exercise rate: 01 share - 01 voting rights
          - Exercise date: Announced later
          - Place: Announced later
          - Agenda:
+ Announcement of business results in 2023, plans and orientations for the following year.
+ Selection of an independent auditor to audit the financial statements 2024.
+ Submit to the General Meeting of Shareholders for approval the draft charter of the company's operations and internal regulations on corporate governance in accordance with the Enterprise Law 2020 and Decree No. 155/2020/ND-CP dated December 31, 2020 detailing the implementation of a number of articles of the Securities Law.
+ Election of members of the Board of Directors/Supervisory Board for the term 2024-2029 will be held during the meeting