sentences:  According to the "People's Daily", Zhang was the first person to call himself a "Red Guard"; he used it as his pen name during his student days.Then on May 29, 1966, just two weeks after the "People's Daily" announced the beginning of the Cultural Revolution, Zhang convinced around ten other senior-level students to use the collective name "Mao Zedong's Red Guards" in addition to their individual signatures when signing a big-character poster denouncing their school officials; three days later, they issued another large-character poster under the same collective name, entitled "We Must Resolutely Carry Out the Great Proletarian Cultural Revolution to its End", with over one hundred signatures.Soon, students from all over Beijing began to call themselves "Red Guards".