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Liu Di (Traditional Chinese: 劉荻; Simplified Chinese: 刘荻; Pinyin: Liú Dí; born October 9, 1981), writing under the screen name "Stainless Steel Rat" (不锈钢老鼠), named after the assertive Harry Harrison science fiction character, became a symbol for democracy and free speech in China since her detention in November 2002. Her screen-name is often translated as Stainless Steel Mouse.
Liu's case comes during a crackdown on Internet content as the government struggles to gain control over a new and popular medium.