His Majesty King Maha Vajiralongkorn Phra Vajiraklaochaoyuhua, at the time the Crown Prince of Thailand, paid a state visit as His Majesty King Bhumibol Adulyadej’s representative to the People’s Republic of China at the invitation of the government of the People’s Republic of China on 23 February – 8 March 1987.

His Majesty King Maha Vajiralongkorn Phra Vajiraklaochaoyuhua, at the time the Crown Prince of Thailand, paid an official visit to the Kingdom of Denmark at the invitation of Her Majesty Queen Margrethe II of Denmark on 13 – 15 September 1988.

His Majesty King Maha Vajiralongkorn Phra Vajiraklaochaoyuhua, at the time the Crown Prince of Thailand, visited the Bodh Gaya Temple, Bihar, on the occasion of His Majesty’s official visit to the Republic of India on 7 – 21 April 1992.

His Majesty King Maha Vajiralongkorn Phra Vajiraklaochaoyuhua, at the time the Crown Prince of Thailand, visited the Khadakwasla National Defence Academy at the town of Pune, on the occasion of His Majesty’s official visit to the Republic of India on 7 – 21 April 1992. 

His Majesty King Maha Vajiralongkorn Phra Vajiraklaochaoyuhua, at the time the Crown Prince of Thailand, paid an official visit to the Islamic Republic of Pakistan on 26 – 29 March 1998. 

Source : Office of His Majesty's Principle Private Secretary  https://king.ohm.go.th/ (Access on 26 July 2017)

His Majesty King Maha Vajiralongkorn Phra Vajiraklaochaoyuhua received Their Majesties Emperor Akihito and Empress Michiko of Japan on the occasion of Their Majesties’ private visit to Thailand on 5 March 2017 at the Ambara Villa of Dusit Palace. 

Source : Ministry of Foreign Affaris 

His Majesty King Maha Vajiralongkorn Phra Vajiraklaochaoyuhua received Their Majesties Emperor Akihito and Empress Michiko of Japan on the occasion of Their Majesties’ private visit to Thailand on 5 March 2017 at the Ambara Villa of Dusit Palace.

Source : Ministry of Foreign Affaris

His Majesty King Maha Vajiralongkorn Phra Vajiraklaochaoyuhua granted an audience to the Permanent Secretary, Ministry of Foreign Affairs, who led a delegation of Ambassadors Extraordinary and Plenipotentiary to take their leave before assuming their posts on 7 - 8 March 2017 at Ambara Villa of Dusit Palace.

Source : Ministry of Foreign Affairs