![Relay satellite 'Queqiao' launched to explore Moon's far side(1/3)](http://www.ecns.cn/hd/2018/05/21/d1629d025ced46639bc8b8cc5d2f55b7.jpg)
A Long March-4C rocket carrying a relay satellite, named Queqiao (Magpie Bridge), is launched at 5:28 a.m. from southwest China's Xichang Satellite Launch Center, May 21, 2018. The relay satellite will set up a communication link between Earth and the planned Chang'e-4 lunar probe that will explore the mysterious far side of Moon. (Photo: China News Service/Liang Keyan)