It's the story of a girl that got killed by her father because of her step sister, and a treasure related to a phoenix. She get reincarnated in the same world in the body of a girl with missing parents, then she went looking for her parents and her brother and she tamed the 4 mythical beasts.
I also remember that in the story she found some white haired guy (male lead). Her parents (after reincarnation) left her with her paternal family to protect her but they bullied her.
Her brother joined some sect (he's a prodigy).