Sogou, Inc. () is a Chinese technology company that offers a search engine. It is a subsidiary of Tencent. The offices of Sogou are located on the southeast corner of Tsinghua University in Beijing. Sogou also has offices in Chengdu co-located with Tencent's office building. In April 2018, Sogou established a R&D center in Guangzhou. Wang Xiaochuan was hired by Sohu.com after graduation from Tsinghua University to create a new search engine. He continued to lead a small team of students from nearby Tsinghua University to develop the new search engine. The Sogou search engine was launched on August 3, 2004, and operated as a separate division within Sohu. In 2006, Sogou invented Sogou Pinyin, the eventual dominant input platform used in China for both desktop PC and mobile. In 2007, Sogou established a search curriculum with Tsinghua University to recruit future engineers and stimulate development. Wang Xiaochuan is known as the "Goalie of the East Gate" for the relentless recruitment from Tsinghua. In 2008, Sogou launched the Sogou Browser. By 2010, search revenue share was under 1%. Wang Xiaochuan flew to meet Jack Ma, founder of Alibaba.com and convinced him of an equity investment. In return, Sohu.com agreed to spin Sogou from a separate division to an independent company, with a separate P&L line. Pre-IPO stock options were granted to employees for the first time. By 2012, growth had risen by over 300% and Sohu.com purchased shares back from Jack Ma. It started to seek out new partnerships by 2013. Wang Xiaochuan met with Pony Ma, CEO of Tencent, and convinced him of a merger. The search engine SoSo.com merged with Sogou and an equity investment of US585 million offering in a bid to accelerate the use of Artificial intelligence in its business.