BY2 sisters, Miko and Yumi, have undergone a transformation not only in their names but also in their career trajectory. The duo, formerly known as BY2, has changed their names to Sun Huan and Sun Yu respectively, forming the new group "Sun Rain". This name change is seen by many as a fresh start for the sisters after they parted ways with their original record label.

The reason behind this change is that the contract between BY2 and Sea Butterfly Music had come to an end. As a result, the sisters decided to establish their own work studio. Their decision to change names was met with mixed reactions from fans who were used to knowing them as BY2.

However, what's more intriguing is the connection between BY2 and Wang Likun (王力宏), a renowned Chinese singer-songwriter. After Liang Jiale (李靓蕾) divorced Wang Likun in 2019, she revealed that there was an unclear relationship between BY2 and Wang Likun. Various marketing outlets even published images of messages exchanged between BY2 on a chat app that seemed flirtatious towards Wang Likun.

BY2 quickly reported these allegations to the authorities but received no response from Liang Jiale who replied with "sue me if you can" when asked about providing evidence of her claims against Wang Likun regarding infidelity allegations made against him by another woman named Liu Meiying (刘美英). Eventually both parties were found guilty of contempt of court due to lack of evidence.

In conclusion while it may seem like changing one's surname could be just another celebrity trend but considering all these factors including personal relationships among celebrities in China's entertainment industry it becomes clear why such changes are significant events which draw public attention not just for artistic purposes but also for gossiping over potential scandals or connections among stars involved.