[by:www.51voa.com] [00:00.00]¸ü¶àÌýÁ¦Çë·ÃÎÊ51VOA.COM [00:00.12]China has launched the first satellite using quantum technology [00:05.16]to send communications back to earth. [00:08.88]Quantum technology will make these communications safe from hackers. [00:14.52]A rocket named the Long March-2D launched the satellite into space. [00:21.52]The launch site was in China's northwest Gobi Desert. [00:26.48]The 600-plus-kilogram satellite is named Micius [00:31.28]after a Chinese philosopher and scientist who lived 2,500 years ago. [00:38.28]Micius will circle the earth every 90 minutes. [00:42.92]It will do this after entering a sun-synchronous orbit [00:47.48]500 kilometers above the earth. [00:50.88] Sun-synchronous orbit means it will always be in sunlight. [00:56.28]This type of orbit is useful for weather, imaging and spy satellites. [01:03.52]China's Xinhua news agency said that during its two year mission, [01:08.84]Micius will establish 'hack-proof' communications. [01:13.28]It will do this by using un-crackable codes. [01:17.96]It explained that a quantum photon, or subatomic particle, [01:23.56] is impossible to wiretap, intercept, hack or crack. [01:30.52]Xinhua said the satellite's first test will be communicating [01:35.48]between Beijing and the Xinjiang capital, Urumqi. [01:40.32]Morris Jones is an Australian who studies the Chinese space program. [01:47.20]He told VOA that this satellite is a major step forward for China. [01:53.96]According to the Wall Street Journal, [01:56.04]quantum technology can have military applications. [02:00.92]Scientists in the United States, Europe and Japan [02:05.69] are also trying to use this technology. [02:10.24]China, however, has made quantum physics [02:13.92] an important part of its five-year economic development plan. [02:19.40]I'm Anna Matteo.