Mary Sue's novel title

She had seen it a long time ago. The female lead was called Hua Qianxing. She knew how to use a bamboo sword. She was a goddess with excellent grades and a cold personality. Other than going to school, she would work in a coffee shop. However, the female lead was a child picked up from her family, and the male lead was a big star.(I think so. I don't really remember.) The female lead had a sister named Hua Qianxing. She was a cute little girl who liked to chase after celebrities and played the piano. The female lead's adoptive parents were a pair of clowns. The second male lead's name was Wei Chen. He was a rich second-generation heir who had congenital heart disease and lost both his parents. He and the butler depended on each other. The female lead pretended to be the second male lead's fiancée in order to save the second male lead and his company. That was all she remembered. Please name the novel…