He was subsequently detained several more times , and ultimately spent 22 years in prisons and labor camps .
During the Anti-Rightist Movement , his poetry was criticized as counter-revolutionary , and Zhang was sent to a labor camp in Ningxia at age 21 .
Zhang was subsequently detained several more times , and ultimately spent 22 years in prisons and labor camps .
During the Anti-Rightist Movement , his poetry was criticized as counter-revolutionary , and Zhang was sent to a labor camp in Ningxia at age 21 .