The book says: There is melting smoke.
It is located at the strategic point of the northern foothills of the Daxuan Mountains, with the Luanjiang River flowing through it, the east and west mountains, and the throat of the north and south. It is connected to Dalan in the north and Xuanzhou of Yimi in the south. It is guarded by the Yuye clan personally. It has the reputation of "Grandma cannot advance", so it is also called "Rongyan".
In the autumn of the third year of Yong'an, Rongyan was destroyed by Gelan. Later generations only found a brief record in the fragments of "Yimi Archives": "At the beginning of September, all the princes rebelled against Xianpan. On the 24th, Ning Jianfeng killed the king. On the 26th, Rong Yan broke."