In the morning of 15 October 2021, H.E. Ambassador Hok Sophea, Cambodian diplomats and staffs of the Royal Embassy of Cambodia in Brunei Darussalam held the 9th commemoration day to mark the passing of Preah Karona Preah Bat Samdech Preah Norodom Sihanouk, former King of the Kingdom of Cambodia, who passed away on 15th October 2012.