Thailand's newly crowned King Maha Vajiralongkorn, Queen Suthida, Princess Bajrakitiyabha, Prince Dipangkorn and Princess Sirivannavari Nariratana are seen at the balcony of Suddhaisavarya Prasad Hall at the Grand Palace, where King grants a public audience to receive the good wishes of the people in Bangkok, Thailand May 6, 2019.REUTERS/Athit Perawongmetha 

Thailand's newly crowned King Maha Vajiralongkorn, Queen Suthida, Princess Bajrakitiyabha, Prince Dipangkorn and Princess Sirivannavari Nariratana are seen at the balcony of Suddhaisavarya Prasad Hall at the Grand Palace, where King grants a public audience to receive the good wishes of the people in Bangkok, Thailand May 6, 2019.REUTERS/Athit Perawongmetha 

Thailand's newly crowned King Maha Vajiralongkorn looks at his son Prince Dipangkorn on the balcony of Suddhaisavarya Prasad Hall at the Grand Palace, where the King grants a public audience to receive the good wishes of the people, in Bangkok, Thailand May 6, 2019. REUTERS/Soe Zeya Tun 

Princess Bajrakitiyabha, Princess Sirivannavari Nariratana and Prince Dipangkorn are seen at the balcony of Suddhaisavarya Prasad Hall at the Grand Palace, where Thailand's newly crowned King Maha Vajiralongkorn grants a public audience to receive the good wishes of the people in Bangkok, Thailand May 6, 2019. REUTERS/Jorge Silva 

Thailand's newly crowned King Maha Vajiralongkorn, Queen Suthida, Princess Bajrakitiyabha, Prince Dipangkorn and Princess Sirivannavari Nariratana are seen at the balcony of Suddhaisavarya Prasad Hall at the Grand Palace where King grants a public audience to receive the good wishes of the people in Bangkok, Thailand May 6, 2019. REUTERS/Navesh Chitrakar 

Thailand's newly crowned King Maha Vajiralongkorn, Queen Suthida, Princess Bajrakitiyabha, Prince Dipangkorn and Princess Sirivannavari Nariratana are seen at the balcony of Suddhaisavarya Prasad Hall at the Grand Palace where King grants a public audience to receive the good wishes of the people in Bangkok, Thailand May 6, 2019.REUTERS/Jorge Silva 

Thailand's newly crowned King Maha Vajiralongkorn, Queen Suthida, Princess Bajrakitiyabha, Prince Dipangkorn and Princesses Sirivannavari Nariratana are seen at the balcony of Suddhaisavarya Prasad Hall at the Grand Palace where King grants a public audience to receive the good wishes of the people in Bangkok, Thailand May 6, 2019.REUTERS/Soe Zeya Tun 

Thailand's newly crowned King Maha Vajiralongkorn, Queen Suthida, Princess Bajrakitiyabha, Prince Dipangkorn and Princess Sirivannavari Nariratana are seen at the balcony of Suddhaisavarya Prasad Hall at the Grand Palace where King grants a public audience to receive the good wishes of the people in Bangkok, Thailand May 6, 2019.REUTERS/Jorge Silva 

Thailand's newly crowned King Maha Vajiralongkorn, Queen Suthida, Princess Bajrakitiyabha, Prince Dipangkorn and Princesses Sirivannavari Nariratana are seen at the balcony of Suddhaisavarya Prasad Hall at the Grand Palace where King grants a public audience to receive the good wishes of the people in Bangkok, Thailand May 6, 2019.REUTERS/Jorge Silva 

Thailand's newly crowned King Maha Vajiralongkorn, Queen Suthida, Princess Bajrakitiyabha, Princess Sirivannavari Nariratana and Prince Dipangkorn are seen at the balcony of Suddhaisavarya Prasad Hall at the Grand Palace where King grants a public audience to receive the good wishes of the people in Bangkok, Thailand May 6, 2019.REUTERS/Athit Perawongmetha 

Thailand's new King Maha Vajiralongkorn Bodindradebayavarangkun is seen on his way out from the Grand Palace in Bangkok, Thailand, December 2, 2016. REUTERS/Jorge Silva TPX IMAGES OF THE DAY 

Thailand's new King Maha Vajiralongkorn Bodindradebayavarangkun is seen on his way out from the Grand Palace in Bangkok, Thailand, December 2, 2016. REUTERS/Jorge Silva 

Thailand's new King Maha Vajiralongkorn Bodindradebayavarangkun is seen on his way out from the Grand Palace in Bangkok, Thailand, December 2, 2016. REUTERS/Jorge Silva 

Thailand's new King Maha Vajiralongkorn Bodindradebayavarangkun is seen on his way out from the Grand Palace in Bangkok, Thailand, December 2, 2016. REUTERS/Jorge Silva 

Thailand's new King Maha Vajiralongkorn Bodindradebayavarangkun is seen on his way to the Grand Palace in Bangkok, Thailand, December 2, 2016. REUTERS/Jorge Silva TPX IMAGES OF THE DAY 

Thailand's new King Maha Vajiralongkorn Bodindradebayavarangkun is seen on his way to the Grand Palace in Bangkok, Thailand, December 2, 2016. REUTERS/Jorge Silva 

Thailand's new King Maha Vajiralongkorn Bodindradebayavarangkun is driven to the Grand Palace in Bangkok, Thailand, December 2, 2016. REUTERS/Jorge Silva 

Thailand's new King Maha Vajiralongkorn Bodindradebayavarangkun is seen on his way to the Grand Palace in Bangkok, Thailand, December 2, 2016. REUTERS/Jorge Silva 

Thailand's Crown Prince Maha Vajiralongkorn leaves the Grand Palace in Bangkok, Thailand, December 1, 2016. REUTERS/Jorge Silva 

Thailand's Crown Prince Maha Vajiralongkorn leaves the Grand Palace in Bangkok, Thailand, December 1, 2016. REUTERS/Jorge Silva 

Thailand Crown Prince Maha Vajiralongkorn arrives at the Grand Palace in Bangkok, Thailand, December 1, 2016. REUTERS/Jorge Silva 

Officials buy a picture of Crown Prince Maha Vajiralongkorn for their office, at a royal memorabilia shop in Bangkok, Thailand, December 1, 2016. REUTERS/Chaiwat Subprasom 

Officials buy a picture of Crown Prince Maha Vajiralongkorn for their office, at a royal memorabilia shop in Bangkok, Thailand, December 1, 2016. REUTERS/Chaiwat Subprasom 

A woman holds up a picture of Thailand's Crown Prince Maha Vajiralongkorn before he arrives at the Grand Palace in Bangkok, Thailand, December 1, 2016. REUTERS/Chaiwat Subprasom 

An official walks past pictures of Crown Prince Maha Vajiralongkorn for sale at a royal memorabilia shop in Bangkok, Thailand, December 1, 2016. REUTERS/Chaiwat Subprasom 

Thailand's Crown Prince Maha Vajiralongkorn arrives at the Grand Palace in Bangkok, Thailand, December 1, 2016. REUTERS/Athit Perawongmetha 

People holds up pictures of Thailand's Crown Prince Maha Vajiralongkorn and late King Bhumibol Adulyadej at the Grand Palace in Bangkok, Thailand, December 1, 2016. REUTERS/Athit Perawongmetha 

TV screen showing Thailand's Crown Prince Maha Vajiralongkorn takes part in a ceremony honouring Thailand's late King Bhumibol Adulyadej at the Grand Palace in Bangkok, Thailand, December 1, 2016. REUTERS/Athit Perawongmetha 

A woman holds up a picture of Thailand's Crown Prince Maha Vajiralongkorn before he arrives at the Grand Palace in Bangkok, Thailand, December 1, 2016. REUTERS/Athit Perawongmetha 

People holds up pictures of Thailand's Crown Prince Maha Vajiralongkorn and late King Bhumibol Adulyadej at the Grand Palace in Bangkok, Thailand, December 1, 2016. REUTERS/Athit Perawongmetha 

Thailand's Crown Prince Maha Vajiralongkorn arrives at the Grand Palace in Bangkok, Thailand, December 1, 2016. REUTERS/Jorge Silva 

Thailand's Crown Prince Maha Vajiralongkorn arrives at the Grand Palace in Bangkok, Thailand, December 1, 2016. REUTERS/Jorge Silva 

A wrapped picture of Thailand's Crown Prince Maha Vajiralongkorn is displayed for sale at a royal memorabilia shop in Bangkok, Thailand, November 29, 2016. REUTERS/Jorge Silva 

A man unwraps a picture of Thailand's Crown Prince Maha Vajiralongkorn displayed for sale at a royal memorabilia shop in Bangkok, Thailand, November 29, 2016. REUTERS/Jorge Silva 

People walk past a picture of Crown Prince Maha Vajiralongkorn displayed for sale at a royal memorabilia shop in Bangkok, Thailand, November 29, 2016. REUTERS/Jorge Silva 

A woman walks past a picture of Crown Prince Maha Vajiralongkorn displayed for sale at a royal memorabilia shop in Bangkok, Thailand, November 29, 2016. REUTERS/Jorge Silva 

Thailand's Prime Minister Prayuth Chan-ocha speaks during a news conference after a weekly cabinet meeting to announce that Crown Prince Maha Vajiralongkorn is to ascend the throne after revered King Bhumibol Adulyadej passed away, at Government House in Bangkok, Thailand, November 29, 2016. REUTERS/Athit Perawongmetha 

Thailand's Prime Minister Prayuth Chan-ocha speaks during a news conference after a weekly cabinet meeting to announce that Crown Prince Maha Vajiralongkorn is to ascend the throne after revered King Bhumibol Adulyadej passed away, at Government House in Bangkok, Thailand, November 29, 2016. REUTERS/Athit Perawongmetha 

Pictures of Crown Prince Maha Vajiralongkorn are displayed for sale at a royal memorabilia shop while Thailand's parliament is set to announce his ascend to the throne after revered King Bhumibol Adulyadej passed away on October 13, in Bangkok, Thailand, November 29, 2016. REUTERS/Jorge Silva 

Pictures of Crown Prince Maha Vajiralongkorn are displayed for sale at a royal memorabilia shop while Thailand's parliament is set to announce his ascend to the throne after revered King Bhumibol Adulyadej passed away on October 13, in Bangkok, Thailand, November 29, 2016. REUTERS/Jorge Silva 

Pictures of Crown Prince Maha Vajiralongkorn are display for sale at a royal memorabilia shop while Thailand's parliament is set to announce his ascend to the throne after revered King Bhumibol Adulyadej passed away on October 13, in Bangkok, Thailand, November 29, 2016. REUTERS/Jorge Silva 

Pictures of Crown Prince Maha Vajiralongkorn are displayed for sale at a royal memorabilia shop as Thailand's parliament is set to announce his ascend to the throne after revered King Bhumibol Adulyadej passed away on October 13, in Bangkok, Thailand, November 29, 2016. REUTERS/Jorge Silva 

A woman displays pictures of Crown Prince Maha Vajiralongkorn for sale at a royal memorabilia shop as Thailand's parliament is set to announce his ascend to the throne after revered King Bhumibol Adulyadej passed away on October 13, in Bangkok, Thailand, November 29, 2016. REUTERS/Jorge Silva 

A picture of Crown Prince Maha Vajiralongkorn is displayed for sale at a royal memorabilia shop as Thailand's parliament is set to announce his ascend to the throne after revered King Bhumibol Adulyadej passed away on October 13, in Bangkok, Thailand, November 29, 2016. REUTERS/Jorge Silva 

A picture of Crown Prince Maha Vajiralongkorn is seen in a shop while Thailand's parliament is set to announce his ascend to the throne after revered King Bhumibol Adulyadej passed away on October 13, in Bangkok, Thailand, November 29, 2016. REUTERS/Jorge Silva 

A picture of Crown Prince Maha Vajiralongkorn is seen in a shop as Thailand's parliament is set to announce his ascend to the throne after revered King Bhumibol Adulyadej passed away on October 13, in Bangkok, Thailand, November 29, 2016. REUTERS/Jorge Silva 

A woman displays pictures of Crown Prince Maha Vajiralongkorn for sale at a royal memorabilia shop as Thailand's parliament is set to announce his ascend to the throne after revered King Bhumibol Adulyadej passed away on October 13, in Bangkok, Thailand, November 29, 2016. REUTERS/Jorge Silva 

Members of the National Legislative Assembly take part in a meeting as Thailand's parliament is set to announce that Crown Prince Maha Vajiralongkorn is to ascend the throne after revered King Bhumibol Adulyadej passed away on October 13, at the Parliament in Bangkok, Thailand, November 29, 2016. REUTERS/Chaiwat Subprasom 

Members of the National Legislative Assembly take part in a meeting as Thailand's parliament is set to announce that Crown Prince Maha Vajiralongkorn is to ascend the throne after revered King Bhumibol Adulyadej passed away on October 13, at the Parliament in Bangkok, Thailand, November 29, 2016. REUTERS/Chaiwat Subprasom 

Members of the National Legislative Assembly take part in a meeting as Thailand's parliament is set to announce that Crown Prince Maha Vajiralongkorn is to ascend the throne after revered King Bhumibol Adulyadej passed away on October 13, at the Parliament in Bangkok, Thailand, November 29, 2016. REUTERS/Chaiwat Subprasom 

Members of the National Legislative Assembly take part in a meeting as Thailand's parliament is set to announce that Crown Prince Maha Vajiralongkorn is to ascend the throne after revered King Bhumibol Adulyadej passed away on October 13, at the Parliament in Bangkok, Thailand, November 29, 2016. REUTERS/Chaiwat Subprasom 

Members of the National Legislative Assembly take part in a meeting as Thailand's parliament is set to announce that Crown Prince Maha Vajiralongkorn is to ascend the throne after revered King Bhumibol Adulyadej passed away on October 13, at the Parliament in Bangkok, Thailand, November 29, 2016. REUTERS/Chaiwat Subprasom 

An official walks past the Parliament where members of the National Legislative Assembly will take part in a meeting to invite Crown Prince Maha Vajiralongkorn to become the country's new king, in Bangkok, Thailand, November 29, 2016. REUTERS/Chaiwat Subprasom 

FILE PHOTO: Thailand's Crown Prince Maha Vajiralongkorn attends an event commemorating the death of King Chulalongkorn, known as King Rama V, as he joins people during the mourning of his father, the late King Bhumibol Adulyadej, at the Royal Plaza in Bangkok, Thailand, October 23, 2016. REUTERS/Athit Perawongmetha/File Photo 

Thailand's Crown Prince Maha Vajiralongkorn attends an event commemorating the death of King Chulalongkorn, known as King Rama V, as he joins people during the mourning of his father, the late King Bhumibol Adulyadej, at the Royal Plaza in Bangkok, Thailand, October 23, 2016. To match Exclusive THAILAND-KING/ REUTERS/Athit Perawongmetha/File Photo 

Thailand's Crown Prince Maha Vajiralongkorn attends an event commemorating the death of King Chulalongkorn, known as King Rama V, as he joins people during the mourning of his father, the late King Bhumibol Adulyadej, at the Royal Plaza in Bangkok, Thailand, October 23, 2016. REUTERS/Athit Perawongmetha 

Thailand's Crown Prince Maha Vajiralongkorn attends an event commemorating the death of King Chulalongkorn, known as King Rama V, as he joins people during the mourning of his father, the late King Bhumibol Adulyadej, at the Royal Plaza in Bangkok, Thailand, October 23, 2016. REUTERS/Athit Perawongmetha 

Thailand's Crown Prince Maha Vajiralongkorn attends an event commemorating the death of King Chulalongkorn, known as King Rama V, as he joins people during the mourning of his father, the late King Bhumibol Adulyadej, at the Royal Plaza in Bangkok, Thailand, October 23, 2016. REUTERS/Athit Perawongmetha TPX IMAGES OF THE DAY

Thailand's Crown Prince Maha Vajiralongkorn attends an event commemorating the death of King Chulalongkorn, known as King Rama V, as he joins people during the mourning of his father, the late King Bhumibol Adulyadej, at the Royal Plaza in Bangkok, Thailand, October 23, 2016. REUTERS/Athit Perawongmetha TPX IMAGES OF THE DAY

Thailand's Crown Prince Maha Vajiralongkorn attends an event commemorating the death of King Chulalongkorn, known as King Rama V, as he joins people during the mourning of his father, the late King Bhumibol Adulyadej, at the Royal Plaza in Bangkok, Thailand, October 23, 2016. REUTERS/Athit Perawongmetha