Kaiyuan Za Bao, or Kaiyuan Chao Pao, Bulletin of the Court, was an official publication which first appeared in the 8th century, during the Kaiyuan era. Its main subscribers were imperial officials. Every day the political news and domestic news were collected by the editors, and the writers transcribed it to send to the provinces. It was hand printed on silk, and appeared between 713 and 734.