Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. On several occasions, the government and Internet service providers of the People's Republic of China (PRC) have blocked access to the online encyclopedia Wikipedia due to strict censorship laws enacted by the PRC. The blocks function in a similar way to a content filter. As with Internet censorship in the PRC in general, the self-governing territories of Hong Kong and Macau, which have separate legal systems, are not affected. Wikimedia sites have been blocked at least three times in their history.

Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.