establish their own communities of friends who are also registered users. By July 2009, it had reached 100 million registered users Baidu Baike, is China's largest online encyclopedia by users and page views/web traffic; second largest encyclopedia by article count (after Hudong). Baidu Translate (), an online translation service originated in February 2013. As of April 2020, it supports 200 languages, the most out of any online translation service, to help fight against COVID-19. China Digital Village Encyclopedia (), in June 2009, Baidu announced it would compile the largest digital rural encyclopedia in China, according to China Securities Journal. It is expected to include 500,000 administrative villages in China, covering 80% of the total 600,000 villages in China. Baidu is creating the content of this encyclopedia largely from participants of its "rural information competition" (), on which it has spent roughly five million yuan on incentives. Baidu sees China's rural areas as great potential for electronic business (e-business), evidenced by the fact that revenue grew the fastest from agriculture, forestry, animals, and fishery in the company's keyword promotion project, a crucial source of Baidu's total revenue. In addition to Baidu Encyclopedia, the company scales up keyword promotion and takes advantage of other products, such as Baidu Zhidao and Baidu Youa, to provide consultation, brand ad exhibitions and online network marketing/sales platform support, marketing information for rural tourism and promoting local products. Baidu Search Ranking provides listings of search terms based on daily search queries entered on Baidu.com. The listings are organized by categories and allow users to locate search terms on topics of interest. Baidu Web Directory enables users to browse and search through websites that have been organized into categories. Baidu Government Information Search allows users to search various regulations, rules, notices, and other information announced by People's Republic of China government entities. Baidu Postal Code Search enables users to search postal codes in hundreds of cities in China. Educational Website Search allows users to search the Websites of educational institutions. Baidu University Search allows users to search information on or browse through the Websites of specific universities in China Baidu Legal Search enables users to search a database that contains national and local laws and regulations, cases, legal decisions, and law dictionaries. Baidu Love is a query-based searchable community where registered users can write and post messages to loved ones. Baidu Patent Search enables users to search for