His Majesty Sultan Haji Hassanal Bolkiah Mu'izzaddin Waddaulah ibni Al-Marhum Sultan Haji Omar 'Ali Saifuddien Sa'adul Khairi Waddien, Sultan and Yang Di-Pertuan of Brunei Darussalam, left for Ha Noi, the Socialist Republic of Viet Nam for a State Visit from 1st to 2nd December 2025 at the invitation of His Excellency Luong Chuong, President of the Socialist Republic of Viet Nam. Accompanying His Majesty was His Royal Highness Prince 'Abdul Mateen. Prior to leaving Istana Nurul Iman, Doa Selamat was recited by Yang Berhormat Pehin Datu Seri Maharaja Dato Paduka Seri Setia Doctor Ustaz Haji Awang Abdul Aziz bin Juned, the State Mufti.

Present at His Majesty the Sultan's Flight Hangar in Rimba to bid farewell to His Majesty were members of the Royal Family. Also present were Yang Amat Mulia Pengiran-pengiran Cheteria; the Speaker of the Legislative Council; Cabinet Ministers; Members of the Privy Council; Deputy Ministers; Commissioner of Police, the Royal Brunei Police Force and Commander of the Royal Brunei Armed Forces.

Upon arrival at Noi Bai International Airport, Ha Noi, His Majesty was greeted by His Excellency Le Khanh Hai, Chairman of the Office of the President as Minister-in-attendance; Vu Dai Thang, Chairman of the Hanoi People's Committee; and His Excellency Nguyen Manh Cuong, Deputy Minister of Foreign Affairs. Also present were Yang Berhormat Dato Seri Setia Awang Haji Erywan bin Pehin Datu Pekerma Jaya Haji Mohd. Yusof, Second Minister of Foreign Affairs; and Her Excellency Datin Paduka Malai Hajah Halimah binti Malai Haji Yussof, Ambassador Extraordinary and Plenipotentiary of Brunei Darussalam to the Socialist Republic of Viet Nam. His Majesty proceeded to walk past the Static Guard of Honour. His Majesty's previous State Visit to the Socialist Republic of Viet Nam was on 26th to 28th March 2019, which resulted in the upgrading of bilateral relations to a Comprehensive Partnership.