Dong Yue is bordered by 5 other countries. At the top was Pohai, at the bottom was Shinelan, to the left was Apollo kingdom, and to the right was Malaga. All five of these countries originated was the Great Han kingdom but war happens and all are separated over the past years.
In my father's generation, there were 15 princes and 6 princesses.
My Father was the first Prince born to my Imperial Grandmother who is the consort dowager. Father had 2 sons and 5 daughters.
His Majesty was the second prince born from the late empress who died at childbirth. He was brought up by my grandmother. The new empress that was elected after His Majesty's mother was her sister. So His majesty's aunt. His majesty did not have any sons and only had 5 daughters.
The next child born is a princess Li Hui Qing. She was known as the third princess. Grand Aunt here is Father's, beloved sister. She is married to the General of Po Hai kingdom. And to my knowledge, she has a daughter and two sons. And living quite a good life.
Prince Rong is the fourth prince. He has two sons and three daughters. He is the son of the late emperor's beloved Su consort. His maternal family is a Count family and works in the imperial court.
Prince Nan is the fifth prince. He was my father's blood brother. He sided with my father in the fight for the throne. He has one son and a daughter. His daughter is engaged to my mother's brother's grandchild.
Prince Bei is the sixth prince. He and Prince Rong have the same mother. He has three sons and one daughter. Because Li Tang er is his only daughter she is the apple of his eye.
Princess Li Xin Yang is the seven princesses. She is the current empress dowager's firstborn child. She married a Duke in the Shinai kingdom. A kingdom bordering Po Hai kingdom. She has a daughter and two sons. So the emperor's blood sister.
Prince Dong is the eighth prince. He is the current empress dowager's son. He is Prince Xi's oldest twin brother. Has two sons and 2 daughters.
Prince Xi is the ninth prince. He is Prince Dong's younger twin brother. He had three sons and two daughters.
Prince Chen is the tenth Prince. He is father's youngest brother. He also sided with father during the fight. He has only a son and adopted daughter Li Yun.
Princess Li Hui Yun is the 11 princess. She is her father's youngest sister. She married a borderline General called Chu Xiu Ming. She has two daughters and a son.
Princess Li Hui Ling is the 12 princess. She is Prince Rong's youngest sister. She married a Count in Apollo's kingdom. Has a daughter.
Princess Li Hui Liang is the 13 princess. She married the Governor in charge of military affairs in Dong Yue. She is the youngest Princess born to the empress.
Prince Feng is the 14 prince who has died in the fight for the throne.
Prince Ning is the 15 prince who died of illness.
Prince Yue is the 16 prince. He got banished to Po Hai kingdom after he helped prince Dong in the fight for the crown.
The other 4 princes either died in childhood due to people's schemes or were miscarriages.
So we can see here that there are three factors in the fight for the throne. Prince Xi, Prince Bei, Prince Dong, and Prince Nan have all passed away leaving their eldest son as their heir. That leaves us with His Majesty, Prince Rong and Prince Chen who are still alive in the father's generation. The Princess won't get into the fight unless their sibling/nephew asks them for soldiers. Apart from Princess Hui Ying and Princess Hui Qing, the other princess marriage were all political. To my understanding, Princess Hui Yun was the only one who fell in love with her husband after their marriage.
The prince of the past generation has made factors already and I believe it'll probably be the same allies as the past. All of the princes would fight to be the Prince Regent. I mean who apart from me doesn't want to be the Prince Regent? He will, later on, become the Emperor. The emperor rules everything of course everyone would want his position.