26 June 2007 - His Royal Highness Prince Mohamed Bolkiah, Minister of Foreign Affairs and Trade, and Her Royal Highness Pengiran Anak Isteri Pengiran Anak Hajah Zariah, hosted a farewell lunch for His Excellency Ha Hong Hai, the outgoing Ambassador of the Socialist Republic of Vietnam and Madam Tran Thi Ngoc Tho at the Balai Penghadapan, Bukit Kayangan.

Her Royal Highness Princess Hajah Masna, Ambassador-at-Large at the Ministry of Foreign Affairs and Trade, and Yang Amat Mulia Pengiran Lela Cheteria Sahibun Najabah Pengiran Anak Haji Abdul Aziz were also present at the lunch.

His Excellency Ha Hong Hai has been Ambassador of the Socialist Republic of Vietnam to Brunei Darussalam since October 2003.