article_snippet: Mr Xie told the male pupils from Nanguang High School in Fujian to stay behind after class on Thursday because they were being too loud.
article_snippet: Mr Liu, said Mr Xie, who is in his 40s, was supervising a small self-study group around 7.30pm when the students were too noisy.
highlights_snippet: Mr Xie told students from Nanguang High School to stay behind after class .
  