Core Viewpoint - The commemoration of Qian Xuesen's return to China highlights the importance of inheriting the spirit of older generations of scientists, emphasizing dedication and focus in addressing key technological challenges [1][2]. Group 1: Commemoration Activities - The Chinese Academy of Sciences' Institute of Mechanics held a commemorative event for the 70th anniversary of Qian Xuesen's return, featuring a special exhibition titled "For the Country's Sword: Qian Xuesen and China's Aerospace Industry" [1]. - Liu Guiju, the Party Secretary of the Institute of Mechanics, reflected on Qian Xuesen's contributions and the institute's achievements over the past 70 years in scientific research and talent cultivation [1]. Group 2: Youth Team's Responsibilities - Zhang Chen'an, a representative of the Qian Xuesen Technology Assault Youth Commando Team, expressed the transformation of the team's identity and the responsibility that comes with it, emphasizing the need to honor the legacy of Qian Xuesen [2]. - The team is committed to producing innovative results that live up to the expectations associated with Qian Xuesen's name, focusing on the importance of integrity and respect in their research [2]. Group 3: Technological Advancements - Zhang Chen, an engineer at the Institute of Mechanics and a member of the youth team, shared the team's efforts in advancing hypersonic technology under Qian Xuesen's "engineering science" philosophy [3]. - The team has made significant strides in addressing national demands for high-speed, low-cost, and practical flight technologies, achieving multiple domestic firsts through innovative design and rapid iteration processes [3].