[The whole thing is based on imagination, maybe OOC, Murong Fu and Duan Yanqing are twins. It will probably mainly involve the restoration of officials and the cb direction of Duan Yanqing, Duan Yu, and Wang Yuyan, including the cp direction of the restoration of Yan.
Warning: It involves substantial father-swapping. After rebirth, Duan Yanqing and Murong Fu are biological father and son who are connected by blood, so please be careful.
Source of inspiration: I saw an analysis before that said that Murong Fu and Duan Yanqing are actually similar to each other. They both achieved great success at a young age, but encountered huge setbacks later. Then in the original text of Tian Long Ba Bu, Duan Yanqing also said that if he had not learned that he had a son, reinstatement and recognizing him as a foster father would actually be the best of both worlds.
Since the relationship between them was shallow in the past life, it is better to continue the relationship between father and son in the next life. I feel that the compatibility between Duan Yanqing and Murong Fu as father and son should be pretty good (although the persecution is a bit strong). The words of Murong Bo, a spoiled father, are not good for reinstatement anyway, so let him have nothing to do with him after reincarnation.
Purpose: After rebirth, Murong Fu became Duan Yanqing's biological son and Duan Yu's biological brother.