The accompanying satellite of Shenzhou-7 orbital module has accomplished its preset mission after 100 days in space, the Beijing Aerospace Control Center (BACC) said on Sunday.

This achievement marks China's "preliminary mastery of satellite monitor technology," the center said. Since there are still some extra fuel left, the satellite will continue its flight for more scientific experiments.

After being released on Sept. 26, one day after China's third manned spacecraft was launched, the accompanying satellite was adjusted 13 times through engine ignitions so that it could focus on the orbital module of Shenzhou-7.

The center said the accompanying satellite has being flying around the orbital module in an elliptical circle, with the farthest distance of 7.6 kilometers and the nearest of 3.8 kilometers.

The satellite has sent back thousands of high-quality pictures of the orbital module, which were captured by its two cameras.

According to the center, the three Taikonauts aboard Shenzhou-7-- Zhai Zhigang, Liu Boming and Jing Haipeng -- have ended their tours across the country, and they will continue their regular training course to prepare for the establishment of China's first space station.

China successfully launched the Shenzhou-7 spacecraft on Sept.25 last year, making it the third country in the world to conduct extravehicular activity (EVA) in space following the former Soviet Union and the United States.