A Chinese rocket to be used for the launch of the country\'s first manned spacecraft has been delivered to a launch center in northwest China, officials said. The Long March-2F carrier rocket that will be used for the upcoming launch of the Shenzhou-9 manned spacecraft has undergone technical advancements to improve its reliability and safety, a spokesman with the country\'s manned space program said Thursday. Assembly and tests will be carried out on the rocket at the Jiuquan Satellite Launch Center, China\'s state-run news agency Xinhua reported. The Shenzhou-9 manned spacecraft has been at the launch center since April 9 and is being prepared for its manned rendezvous and docking mission with China\'s orbiting Tiangong-1 space module, the spokesman said. The Tiangong-1 was launched on Sept. 29 and an unmanned Shenzhou-8 spacecraft docked with it in early November. China will launch the Shenzhou-9 sometime between June and August, Xinhua reported.