March 3, 1971 (, Xinhai February seventh day), "Practice One" of our nation's first scientific experiment satellite was successfully launched.

1971, inspired by Mao Zedong "We also engage in satellite instructions, China successfully launched a scientific experiment artificial earth satellite.
satellite, weighing 221 kg. The closest point 266 kilometers from Earth in its orbit, the farthest point of 1826 km, the orbital plane of the earth's equatorial plane clip turtle was 69.9 degrees; around the earth takes 106 minutes. 20009 MHz and 19995 MHz frequency to the ground and sent back to the scientific and experimental data, satellite cosmic rays with heat detectors, X-rays, high magnetic field and track, so that China's first space satellites physical data.
This is China's second artificial satellites also a scientific experiment satellite, Practice One successful launch "target =" _blank "> Practice One" was successfully launched.