ANKARA Three Chinese astronauts aboard Shenzhou-18 spaceship on Friday successfully entered China's space station, state-run media said. The astronauts were welcomed by their colleagues on the Shenzhou-17 mission, Xinhua News Agency reported. The six astronauts will live and work together for about five days. On Thursday, the Shenzhou-18 spaceship lifted off from the Jiuquan Satellite Launch Center atop a Long March 2F rocket at 8.59 p.m. (1259GMT). Earlier, a sending-off ceremony for the three