Google faces serious challenges – and not all of them from regulators – as CEO Sundar Pichai seeks to return to the mainland market after five years’ absence through its Google Play app store for the Android mobile operating system, Reuters reported. Andy Tian, CEO Chinese app developer Asia Innovations and former Google executive, said Google had lost basically all ground in most of its major services, especially search and video streaming, to Chinese players such as Internet giants Baidu, Tencent, Alibaba and Qihoo 360. All have built their own products and services to replace or even surpass Google’s offerings.