At first glance, a Nobel prize winning author, a bottle of green tea and Beijing’s Tsinghua University have little in common. But in recent weeks they have been dubbed by China’s nationalist netizens as the “three new evils” in the fight to defend the country’s valour in cyberspace. Last month a patriotic blogger called Wu Wanzheng filed a lawsuit against China’s only Nobel prize-winning author, Mo Yan, accusing him of smearing the Communist army and glorifying Japanese soldiers in his fictional works set during the Japanese invasion of China. Wu,…