Core Viewpoint - The Tianzhou-9 cargo spacecraft is set to launch soon, carrying approximately 6.5 tons of supplies to support the Shenzhou-20 and Shenzhou-21 astronaut missions, including new space suits and upgraded equipment for the space station [1][7]. Group 1: Mission Preparation - The Tianzhou-9 spacecraft and Long March 7 rocket have been transported to the launch site, with all systems in good condition and ready for pre-launch checks and tests [1][4]. - The Long March 7 rocket, standing at 53 meters tall, underwent various assembly and testing processes, including vertical assembly and system performance tests [4][7]. - The rocket's design utilizes advanced 3D digital technology, improving efficiency and reducing the risk of assembly issues compared to traditional 2D designs [8]. Group 2: Cargo and Equipment - The Tianzhou-9 mission will deliver essential supplies for astronauts, including two new sets of domestically developed space suits, enhancing their performance from 3 years and 15 missions to 4 years and 20 missions [7]. - New equipment for the space station includes a core muscle exercise device and advanced scientific experiment apparatus [7]. Group 3: Rocket Specifications and Capabilities - The Long March 7 rocket has a near-Earth orbit payload capacity of 14 tons, suitable for transporting cargo to the space station [7]. - The rocket employs environmentally friendly liquid oxygen and kerosene as propellants, utilizing YF-100 and YF-115 engines [7]. - The launch will mark the 10th flight of the Long March 7 rocket and its 8th mission for cargo transport to the Chinese space station [7]. Group 4: Precision and Navigation - The Long March 7 rocket can continuously optimize its flight path during ascent, enhancing the accuracy of orbital insertion [9]. - The insertion accuracy is impressive, with a deviation control of less than 4 seconds, which is crucial for the docking requirements of the cargo spacecraft [9].