Who can make students angry?

On 18 September 1936, some secondary school students joined hands (聯合行動) and formed an organization called the "Hong Kong Resist Japan and Save the Nation Society" in secret, after having observed a National Humiliation (恥辱) Day commemoration (紀念) ceremony at the Lap Tak School.

Chan, S.J. (2014). East River Column -- Hong Kong Guerrillas in the Second World War and After. Hong Kong: Hong Kong University Press.