The Tr?n dynasty also adopted a unique strategy to practice new emperors: any time a crown prince arrived at the age of eighteen, his predecessor would abdicate and switch the throne above to him, but holding the title of Retired Emperor (Thái Th??ng Hoàng), acting for a mentor to The brand new Emperor.Gi?i Thi?u VF555 cam k?t ??a ??n ng??i ch?i