Crystal Liu Yifei (born 25 August 1987 in Wuhan, China) is a Chinese actress and singer. Although she is often credited as Liu Yi Fei (traditional Chinese: 劉亦菲; simplified Chinese: 刘亦菲), her legal name is Liu Xi Mei Zi (traditional Chinese: 劉茜美子; simplified Chinese: 刘茜美子: 茜 Xi is from German movie "Sissi" (Chinese translation 茜茜公主—hence the pronunciation of xi not qian; her mother calls her Xixi).[1] At the age of 15, Liu Yifei's role as "Wang Yuyan" in the television series, Demi-Gods and Semi-Devils propelled her to fame in China.