(Reuters) – China's largest e-commerce company Alibaba Group Holding has agreed to buy a controlling stake in ChinaVision Media Group Ltd for $804 million, giving it access to TV and movie content as competition in the world's biggest Internet market becomes increasingly cutthroat. The pact, which sent ChinaVision's stock surging, comes amid a flurry of deals as Alibaba, social media giant Tencent Holdings Ltd and search engine Baidu Inc seek to expand into each other's turf. This week … [Read more...] about Alibaba buys ChinaVision controlling stake for $804 million