Police have offered rewards to anyone providing information of an armed robber in central China's Hunan Province. The suspect is believed to have shot a security guard dead and grabbed gold accessories worth about 900,000 yuan from a shop on Friday in Loudi city. Police in the city are offering a reward of 50,000 yuan for information which helps with the manhunt, and a reward of 100,000 yuan for information which leads directly to the arrest. It's being reported that China's largest e-commerce company Alibaba Group is planning to buy a stake in Sina Corp's Weibo. Alibaba is said to value Sina Weibo at around 3 billion U.S dollars and plans to by a 15-20 percent stake in the country's most popular micro blogging service. Earlier earnings report shows that Sina's net income reached 150 million U.S dollars in the third quarter, a 17% increase year-on-year.