Shenzhou 6 crew returned to the ground on June 4. What important historical moments did they witness in China's space flight? How do the three astronauts Fei Junlong, Deng Qingming and Zhang Lu work and live in orbit? How does the space station overcome weightlessness? How to solve the problem of eating? What to do during breaks? Youth representatives from China, India, Kazakhstan, Kyrgyzstan, Russia and other countries asked questions to the Shenzhou <> crew.