Two of China's biggest internet giants have begun their legal battle at the country's Supreme People's Court. The web companies, Qihoo 360 and Tencent, have been involved in a feud over monopolies and unfair practice. The case is China's first anti-monopoly lawsuit in the online market since China's anti-monopoly law took effect in 2008. Experts believe the final verdict could set a future benchmark for other anti-monopoly cases.