China successfully launches two "shijian-6" space environment probe satellites with Long March 4-B rocket carrier at 7:14, Sept. 9, 2004, fromthe Taiyuan Satellite Launch Center in Shanxi Province, north China. (Xinhua photo)

China successfully launches two "shijian-6" space environment probe satellites with Long March 4-B rocket carrier at 7:14, Sept. 9, 2004, fromthe Taiyuan Satellite Launch Center in Shanxi Province, north China.

The Long March 4-B rocket carrier takes off from the Taiyuan Satellite Launch Center in Shanxi Province, north China, Sept. 9, 2004. China launched two geo-environment satellites into space atop a Long March 4-B rocket carrier earlier Thursday, Sept. 9.

The Long March 4-B rocket carrier takes off from the Taiyuan Satellite Launch Center in Shanxi Province, north China, Sept. 9, 2004. China launched two geo-environment satellites into space atop a Long March 4-B rocket carrier earlier Thursday, Sept. 9.

Technician personnel celebrate the success of launch at the Taiyuan Satellite Launch Center in Shanxi Province, north China, Sept. 9, 2004.