Zhihu is a Quora-type question and answer site and news aggregator. Originally based in Chengdu and with creators from Sichuan, China, the website launched on January 26, 2011. The number of registered users on Zhihu exceeded 10 million by the end of 2013, and reached 17 million as of May 2015, with 250 million monthly page views. By the end of 2018, the number of registered users of Zhihu exceeded 220 million and the website accumulated more than 30 million questions and 130 million answers.