NOT KNOWN DETAILS ABOUT VIệT NAM

나무위키�?백과사전�?아니�?검증되지 않았거나, 편향적이거나, 잘못�?서술�?있을 �?있습니다.The Trần dynasty also adopted a unique way to coach new emperors: each time a crown prince reached the age of eighteen, his predecessor would abdicate and switch the throne more than to him, still Keeping the title