Who is he? Presumably only they know.
Long Yan said that the person he loved most was never Yu Chu.
Yu Chu also said that the only person he hated most was Long Yan.
But in the deepest feelings, love and hate, who would be obsessed with it?
As the saying goes: extreme love leads to hatred, extreme hatred leads to desire. The so-called love and hate means that you can't ask for it, you can't let it go, you can't love it, you can't hate it.