I want the name of the novel

He had read a book before, and he only remembered the name of the book. It seemed to be about the two peerless prodigies, but he couldn't find it. The male lead and female lead were siblings, surnamed Yang. She changed her gender every time she transmigrated, and later, both appeared. In detail, the male protagonist practiced internal energy, and the female protagonist had the strength of ten elephants and one dragon. There was a chapter called Steel Tesseract City.