DAE: Notice of record date for a ballot

1. Issuer: Educational Book JSC In Da Nang City
2. Stock code: DAE
3. Par value: VND10,000/share
4. Record date: 25/09/2025
5. Ex-date: 24/09/2025
6. Reason:
     * For a ballot:
          - Exercise rate: 01 share – 01 voting right
          - Content of the ballot:
+ Content 1: To agree in principle to stop the construction project of the 78 Pasteur facility and carry out repairs and renovations to continue using it as an office;
+ Content 2: Some other contents under the authority of the General Meeting of Shareholders (if any);
          - Expected exercise date:
+ Date of sending documents and collecting shareholders' opinions (expected): September 30, 2025.
+ Deadline for receiving the opinion form (expected): October 15, 2025.
          - Place of implementation: The opinion form sent back to the Company will be received and counted at the headquarter of the Educational Book JSC In Da Nang City - No. 39 Trinh Dinh Thao, Cam Le Ward, Da Nang City.