According to the description, I recommend the novel " If I Become a Phoenix and Become an Emperor ". The main character of the book was a female phoenix who was regarded as a good omen by everyone. She had a debt of love and needed to travel the three worlds to be reborn from the fire and return to ancient times. The male lead was a Shangxian. He saved a little phoenix by chance and descended to the mortal world to experience the tribulation. I hope you like my recommendation.