China unveiled on Tuesday a replica of its first permanently crewed space station, which would replace the international community's orbiting laboratory and symbolises the country's major ambitions beyond Earth. The 17-metre (55-foot) core module was a star attraction at the biennial Airshow China in the southern coastal city of Zhuhai, the country's main aerospace industry exhibition. .... ....The International Space Station -- a collaboration between the United States, Russia, Canada, Europe and Japan -- has been in operation since 1998 but is due to be retired in 2024. China will then have the only space station in orbit, though it...