The group of students – led by Zhang Chengzhi at Tsinghua Middle School and Nie Yuanzi at Peking University – originally wrote the posters as a constructive criticism of Tsinghua University and Peking University's administrations, who were accused of harbouring intellectual elitism and bourgeois tendencies.[7] Most of the early Red Guards came from the so-called "Five Red Categories".[8][9]