I'm in the late stage of cancer. Why am I still crying?

Yun Li is a brilliant and elegant girl, and she has been a child of other people's families since she was born. But in the eyes of her family, she is not as good as her adopted sister's tear. She is ignored and misunderstood as a hypocritical and selfish snake. At first, she thought that if she was well-behaved and obedient, even an unloved child would get candy. It was not until she was sent to a mental hospital by her relatives that she realized that she was just a sharpening stone for the heroine of the book and a cannon fodder for conspiracy. Later, she really became the way her family thought she was. Anyone would tremble and call her a "lunatic". - The Yun family inexplicably bound the system of the strategy to capture Yun Li, and they disdained it at first. That vicious sister (daughter), hooked her hand...