After Refusing to Marry into a Wealthy Family, I Became a Female CEO

My mother rescued the old lady of the Cheng family, and the Cheng family promised her a position as a young mistress. My elder sister rushed to become a young mistress, but found out that her husband was an unloved illegitimate child and had been living on the street for two days. After I graduated from a top university, the real head of the Cheng family proposed to me. During the press conference, my sister rushed up to me and pushed me downstairs. I also lost my footing and fell down. After her rebirth, she pretended to be generous and gave up this "good marriage" to me, but she said in my ear full of jealousy: "Sister, just enjoy this incredible wealth for me."