What is the relationship between Ling Qingyuan and Ling Sinan?

Brother-sister relationship Paradox is an original romance novel, which was written by the author at dusk and ended on September 16, 2022. Ling Qingyuan and Ling Sinan are brother and sister, and the novel tells the story between them. My sister was badly told because of her fortune-telling since she was a child, and then she was taken away by her second uncle to raise her, while her brother who relied on her was loved by her parents.