In this photo provided by the Thai Royal Household Bureau, Crown Prince Maha Vajiralongkorn attends a succession ceremony to become King Rama X in Bangkok, Thailand, on Dec.1, 2016. Thailand's Crown Prince Maha Vajiralongkorn accepted invitation from parliament president to ascend to the throne and thus formally proclaimed King Rama X in a televised ceremony broadcast late Thursday. (Xinhua/POOL/Thai Royal Household Bureau)