What is the relationship between Ning and Rong in "A Dream of Red Mansions"?

The Jia family described in "A Dream of Red Mansions" was a large family with a high status in feudal society.

Jia Mansion is divided into two branches, one is Ningguo Mansion and the other is Rongguo Mansion.

The population of Rongguo Mansion is relatively prosperous, while the population of Ningguo Mansion is relatively sparse.

Ning Guogong of Ningguo Mansion and Rong Guogong of Rongguo Mansion are brothers.

Ningguo Gong Jia Yan was the elder brother. After his death, his son Jia Daihua took his title. After Jia Daihua's death, his son Jia Jing took his title.

Jia Jing has a son and a daughter, the son is Jia Zhen and the daughter is Xichun.

After Jia Jing's death, his son Jia Zhen assumed his title.

Jia Zhen's son is Jia Rong, and his daughter-in-law is Qin Keqing.

Duke Rong Jia Yuan was the younger brother. After his death, his son Jia Daishan inherited his title. Jia Daishan's wife was Jia Mu Shi Taijun.

Jia Daishan gave birth to two boys and one girl, namely Jia She, Jia Zheng and Jia Min.

After Jia Daishan's death, his eldest son Jia She washed his title.

Jia She has a son and a daughter, Jia Lian and Yingchun.

Jia She had a younger brother, Jia Zheng, who had three sons and two daughters, namely Jia Zhu.

Jia Baoyu, Jia Huan and Yuanchun, Tanchun.

Jia She's sister Jia Min is Lin Daiyu's mother.

In fact, Ningguo Mansion is higher than Rongguo Mansion, because Ning Gong is second to Changrong Gong.

Of course, at the beginning of the story of "A Dream of Red Mansions", the author designed it like this; there was still an elder living in the Rongguo Mansion, that is Jia Mu, so the Ningrong Mansion and the Ningrong Mansion called her ancestor, the highest seniority.