Smart robot designed to repair urban sewage pipelinesChina's parachute system makes controllable landing of rocket boostersUN says China has role to play in fighting world hungerNew energy selfCyberspace pledges set to narrow divideAustralian police probe why man who stabbed 6 people to death in a Sydney mall targeted womenChinese experts showcase new seed varieties, technology at Uganda agricultural exhibitionChina launches new remote sensing satelliteXi meets Russian foreign ministerHong Kong's first satellite manufacturing center launched