Dear Shareholders,

PetroVietnam Technical Services Corporation respectfully sends to Valued Shareholders and interested Investors Official Letter No. 1823/PTSC-BTK dated November 6, 2026 regarding disclosure of Resolution on the convening of the 2026 Extraordinary General Meeting of Shareholders, as detailed in the attached document.

Sincerely./.

Attachment:
1823/PTSC-BTK