On November 28, 2007, His Majesty King Norodom Sihamoni, their Majesties King-Father Norodom Sihanouk and Queen-Mother Norodom Monineath departed for Beijing to receive medical treatment. They were seen off at the Phnom Penh International Airport by Samdech Akka Mohathammpothisal Chea Sim, Chairman of the Senate, Samdech Akka Mohachakrey Heng Samrin, Chairman of the National Assembly, Samdech Akka Mohapadey Decho Hun Sen, Prime Minister of the Royal Government, by members of the Senate, of the National Assembly, of the Government and of the diplomatic corps.