Ye Yun. The eldest daughter of the Liu family refers to a famous Ye Yun, who is called "the first person in Silicon Valley" on the Internet. Ye Yun, 198 1, a native of Yueyang, Hunan, is a middle school Chinese teacher. In 2009, she began to try to avoid valley, and later became a famous founder and promoter of valley avoidance in China. Ye Yun shared his experience and provided relevant guidance and suggestions. Her theory and method have been supported and recognized by many followers, but it has also caused some controversy. The scientific community has different views on the efficacy and safety of Bigu, which needs further study and proof.