(Removes reference to peak of Hong Kong protests in paragraph 14) SHANGHAI/BEIJING (Reuters) -Chinese protesters have turned to blank sheets of paper to express their anger over COVID-19 restrictions in a rare, widespread outpouring of public dissent that has gone beyond social media to some of China’s streets and top universities. Images and videos circulated online showed students at universities in cities including Nanjing and Beijing holding up blank sheets of paper in silent protest, a tactic used in part to evade censorship or arrest. China is adhering to its tough zero-COVID policy even…