I'm not really a helper

My name is Chen Changsheng, and I am one of the four evils of Zhenwu Daoyuan.I have a younger sister, she is one of the top ten talents of Zhenwu Daoyuan.Helping the younger brother? The strongest sister-helping devil in history! The heavenly system helps the sister, if you want to become a fairy, you can only help the sister first, I am really tired.