On January 29, 2014, Google announced it would, pending regulatory approval, sell Motorola Mobility to the Chinese technology company Lenovo for US$2.91 billion in a cash-and-stock deal, seeing the sale of $750 million in Lenovo shares to Google. Google retained the Advanced Technologies & Projects unit (which was integrated into the main Android team), and all but 2000 of the company's patents. Lenovo had prominently disclosed its intent to enter the U.S. smartphone market, and had previously expressed interest in acquiring BlackBerry, but was reportedly blocked by the Canadian government due to national security concerns. The acquisition was completed on October 30, 2014. The company remained headquartered in Chicago, and continued to use the Motorola brand, while Liu Jun () — president of Lenovo's mobile device business, became the company's chairman.