"We have an expected behaviour pattern [for protests]," one police officer has told the BBC anonymously. "But with this new generation, we do not understand their social media or how they mobilise on the ground."
第19届肖邦国际钢琴比赛结束后，陆逸轩压轴登台连续三晚的庆典音乐会。图丨 © Krzysztof Szlezak，推荐阅读safew官方版本下载获取更多信息
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It makes sense.
Rebecca Morelle, Alison Francis and Greg BrosnanBBC Science