Liu Di (Traditional Chinese: ??; Simplified Chinese: ??; Pinyin: Liú DÃ; born October 9, 1981), writing under the screen name "Stainless Steel Rat" (?????), 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.