Core Viewpoint - The article highlights the dedication and hard work of the personnel at the Dongfeng Aerospace City, who are likened to "rivets" for their commitment to ensuring the safety and success of space missions, particularly the upcoming Shenzhou 21 launch [1][24]. Group 1: Personnel and Responsibilities - The staff at the launch site, including He Jianjun and Zhang Xiangfei, play crucial roles in ensuring the rocket's readiness and safety during the launch process [5][11]. - He Jianjun oversees the gas supply system, which not only supports the rocket and ground equipment but also provides breathing gas for astronauts during ascent and flight [7][9]. - Zhang Xiangfei is responsible for the propellant system, ensuring the safe fueling of the rocket, which involves strict safety protocols due to the flammable and explosive nature of the propellant [11][13]. Group 2: Technological Advancements - The Smart Launch Center, operational since 2017, has significantly reduced the number of personnel required for monitoring the launch site, enhancing efficiency and safety [15][17]. - The center utilizes advanced data analysis to optimize operations, as demonstrated by its ability to identify a suitable transport window for Shenzhou 21 despite adverse weather conditions [19]. Group 3: Personal Commitment and Legacy - Personnel express a deep commitment to their roles, with many, like He Jianjun, stating they would choose to work in China's space program again if given the chance [22]. - The article emphasizes that each individual, while seemingly ordinary, plays a vital role in supporting the nation's space endeavors, contributing to the larger goal of space exploration [24].