Like Google, Baidu has a huge majority of the search market in its native country, from which it derives most of its income. Baidu also has a maps service, a news frontpage, local search, a social network, an online encyclopedia, a web browser (that looks pretty much exactly like Google Chrome), a cloud documents service, and a smartphone operating system (which is based on Google's Android). All ripoffs of Google (or Facebook, or Wikipedia), but all okay. On the other hand, Baidu is also notorious for censoring anything the Chinese government wants, has been caught up in bribery scandals, and offers convenient ways to search for pirated music and videos. It's Dark Google.