As for Fang Jinyu's senior brother, "Grandmaster Meng," and the others, they couldn't be considered to be in the "half-separated" state.
Firstly, "Grandmaster Meng" accepted Fang Jinyu as a disciple on behalf of his master, and then he taught him some cultivation techniques. After that, Fang Jinyu returned to the Tianling Sect and presided over it for hundreds of years. The relationship between the two could be described as extremely deep.
Afterward, Fang Jinyu left the small immortal domain.
Fang Jinyu wanted to find these three people and see if he could use them to help him complete the destruction and reconstruction!
The person Fang Jinyu wanted to find the most was, naturally, his disciple, Chi Suzi. Although he had a master-disciple relationship with her and they should be deeply involved, his "cheater" disciple wouldn't have been chosen by two extraordinary books if that was the case.