On November 29, the Long March 2F Long March 15 carrier rocket developed by the General Manager of China Academy of Launch Vehicle Technology ignited and took off at Jiuquan Satellite Launch Center, sending the Shenzhou 15 manned spacecraft with three astronauts into the scheduled orbit. Now, let's take a look at these "first" and understand the "magic arrow" long two F! The first manned carrier rocket, Chang 2F, is China's first manned rocket, known as "China's Divine Arrow". Liu Feng, the deputy chief designer of the Long March 2F carrier rocket, said that in the past 30 years, the Long March 2F rocket has participated in every step of the "three-step" strategy of China's manned space program, and has carried out all manned spacecraft and target aircraft launch missions since Shenzhou I. "Since the first flight in 1999, 15 Shenzhou spacecraft and two space laboratories have been successfully launched, including 10 manned launch missions, with a success rate of 100%." The first rocket adopts live broadcast of arrow borne images. Every time the rocket is launched, we can watch the launch in real time through TV and mobile phones, and experience the time and time again when the "magic arrow" takes off. According to Liu Feng, the Long 2F rocket made the first attempt to broadcast live images of the rocket during the domestic space launch, making the live broadcast of the rocket launch a "routine". Since the launch of the Long 2F Long Distance Six Rocket in 2005, a telemetry image measurement system has been added. Two cameras are installed on the rocket for real-time transmission and reception. From the ground, rocket images of booster separation, primary and secondary separation, fairing separation, ship rocket separation and other time sequences can be observed. The reliability and safety requirements of the first Long 2F rocket in service are far higher than the international standards from the beginning of development. At present, the reliability of the rocket has been improved to 0.9895 and the safety has reached 0.99,996. In this regard, Chang Wuquan, the chief designer of the Long 2F Rocket, made an analogy: "It is relatively easy to raise the score from 50 to 90, but the work behind raising the score from 90 to 91 is no less than raising the score from 50 to 90." From the appearance, there is a sharp "hat" on the top of the Long 2F rocket - escape tower. If the rocket has an accident, the escape system will start immediately and fly away from the failed rocket with the return capsule like "pulling the turnip". "Their main function is to detect rocket failures in the waiting phase and the entire flight ascent phase. If the rocket has catastrophic failures, we will use the failure detection system and escape system to take the astronauts out of the danger zone to ensure their life safety." Liu Feng said. The first paragraph of the rocket for emergency rescue mission. In the orbital construction and operation phase of the space station, if the space station or spacecraft is in serious danger or failure, the ground must quickly launch a rescue spacecraft to retrieve the astronauts. Therefore, since the implementation of the Shenzhou 12 mission, the Long 2F rocket has adopted the launch mode of "one launch, one backup" and "rolling backup", adding "double insurance" to the life safety of astronauts. In this regard, Chen Muye, the overall designer of the Long 2F rocket, explained: "When one is on standby, two rockets are present at the same time for one mission, and the emergency rescue rocket can be launched as soon as 8.5 days." In the first half of this year, as a manned launch mission of Shenzhou XIV