The Tr?n dynasty also adopted a unique approach to educate new emperors: each time a crown prince reached the age of eighteen, his predecessor would abdicate and turn the throne above to him, nonetheless Keeping the title of Retired Emperor (Thái Th??ng Hoàng), acting as being a mentor to the new Emperor.Gi?i Thi?u VF555 cam k?t ??a ??n ng??i ch?