Core Viewpoint - Zhao Chuandong, one of China's first astronauts, reflects on his journey and the importance of pursuing dreams despite not having flown into space, emphasizing the value of experience and inspiring the next generation [1][5][6]. Group 1: Personal Journey - Zhao Chuandong was selected as one of the first 14 astronauts in China after a rigorous selection process from thousands of candidates [3]. - Although he participated in training for missions from Shenzhou 5 to Shenzhou 10, he did not have the opportunity to fly, which he considers a lifelong regret but not a source of regret [1][5][6]. Group 2: Educational Outreach - During a science class, Zhao shared his experiences with students, encouraging them to set ambitious goals and strive for their potential [5][6]. - He highlighted the significance of the Kármán line, which separates aviation from space, as a metaphor for personal and professional boundaries [3]. Group 3: Inspirational Message - Zhao encourages students to look up at the stars and broaden their horizons, emphasizing the importance of teamwork and collective effort in achieving future goals [6][8]. - He conveyed that exploring the universe allows one to appreciate both the smallness and greatness of humanity, reinforcing the idea that every individual's contribution is vital [6].