On January 15, 2001 (December 21, 2000), Wikipedia was officially established and launched. On January 15, 2001, Wikipedia was officially established and launched. Wikipedia is a free, free, open-content encyclopedia collaboration project with participants from all over the world. This site uses Wiki, which means that anyone can edit any article or entry in Wikipedia. Wikipedia started on January 15, 2001, by Jimmy Wales, Larry Sanger, and a few enthusiastic English-speaking participants. About 3 years later, in March 2004, there were already about 6,000 active participants writing 600,000 entries in 50 languages. Many participants from all over the world make thousands of edits and create new articles every day. Chinese Wikipedia (http://zh.wikipedia.org/wiki/) officially started in October 2002, and as of January 2010 there were 290,550 entries. All text in Wikipedia and most images and other content are published under the GNU Free Documentation License to ensure the freedom and openness of the content. All articles written here will follow the copyleft license, and all content can be freely distributed and copied. Free encyclopedia