1 It was learned from the Bureau of Science and Technology for National Defense and the National Space Administration that China's second Long March V carrier rocket 1 began to inject propellant at Wenchang Space Launch Site in China that afternoon. According to the plan, the rocket will be launched on July 2.

This is the second space journey of Long March V after its first flight in 10, 2016.

Previously, the diameter of the arrow body of China's liquid launch vehicle was mostly 2.25 meters or 3.35 meters, while the diameter of the arrow body of the Long March 5 reached 5 meters. Compared with the "slim" rockets in the past, Long March 5 was nicknamed "Fat Five".

"Fat Five" is a new generation launch vehicle with the most complicated technology and the largest carrying capacity in China. Developed by the First Institute of China Aerospace Science and Technology Corporation, the diameter of China liquid launch vehicle has leapt from 3.35 meters to 5 meters, marking the upgrading of China launch vehicle.

Rockets are the main means of transportation for human beings to enter space at present. As the "big guy" in China's Long March rockets, Pangwu has a carrying capacity of 25 tons in low earth orbit and a geosynchronous transfer orbit 14 ton, which can more than double the carrying capacity of China rockets. With it, we can send bigger and heavier aircraft to further space.

According to the technical personnel of the First Academy of China Aerospace Science and Technology Corporation, the second "Fat Five" has carried out a number of process improvements and optimized designs on the basis of the first rocket test, further improving the reliability of the rocket. The launch allowed live media coverage, which in itself showed that China's space industry was more confident and mature.