She Won't Explain, but the Whole World Is Queuing Up

One smell and she'll know something's wrong with you. Su Tang is an essential oil expert. Her nose can smell a person's physical abnormalities, emotional stucks, and every uneasy signal in the nervous system. A drop of essential oil in her hand is ten times more effective than others. But she never explained, and her replies were all simple. "Don't ask about the efficacy, I can't tell you anything."