Liu Yiyun, 1992, was born in Los Angeles, California on September 8, 2008. She is a Chinese-American female singer, host and a member of the women's singing group f(x). Her parents are from Taiwan Province Province, China, and have settled in the United States.

In 2007, he was found in the SM company draft in Orange County, USA.

In 2008, I went to Korea to start my internship for one and a half years.

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As a member of f(x), Liu Yiyun shines brilliantly on the music stage. Members are also actively challenging what they like and can do, adding more memories and charm to the name f(x). F(x), as an electronic women's group, is not the most unique one, but it always exudes its own beauty.

In the MV of "Rum Pum Pum Pum", the title song of "Pink Tape", the exquisite and unique appearance of five girls attracted people's attention for the first time. Luna with pure black hair, Jung Soo Jung with burgundy color, Suli with flaxen color, Liu Yiyun with golden color, Victoria Song with brown color, five people and five colors, give people a bright feeling.