At 2230 hours, 14 December 2004, Taiwan's National Space Organization launched Sounding Rocket-4 from Pingtung's Chio He Base, carrying out secondary orbital scientific experiments. The NSPO was responsible for planning this particular scientific experiment; it commissioned the sounding rocket made by the Chung Shan Institute of Science and Technology to serve as the carrier. The plan was implemented in cooperation with scientific teams from National Central University and National Cheng Kong University.