BANGKOK, June 9, 2016 (Xinhua) -- Thai Prime Minister Prayuth Chan-ocha (3rd L, front) attends a ceremony celebrating the 70th anniversary of Thai King Bhumibol Adulyadej's accession to the throne in Bangkok, Thailand, June 9, 2016. The Thai king took the throne on June 9, 1946, when he was only 19. He is now the world's longest-serving monarch. (Xinhua/Rachen Sageamsak)