 After the purge, the Trần emperors ruled the country in similar manner to the Lý kings.Noted Trần dynasty accomplishments include the creation of a system of population records based at the village level, the compilation of a formal 30-volume history of Đại Việt (Đại Việt Sử Ký) by Lê Văn Hưu, and the rising in status of the Nôm script, a system of writing for Vietnamese language.The Trần dynasty also adopted a unique way to train new emperors