A staff worker (back) introduces space suit to students at "Mars Base 1 Camp" in Jinchang City of northwest China's Gansu Province on April 17, 2019. The simulated Mars base opened Wednesday in Gansu, aiming to popularize science and boost interest in space exploration. (Xinhua/Fan Peishen)

　　A staff worker (1st L, back) tours a group of students at "Mars Base 1 Camp" in Jinchang City of northwest China's Gansu Province on April 17, 2019. The simulated Mars base opened Wednesday in Gansu, aiming to popularize science and boost interest in space exploration. (Xinhua/Fan Peishen)

　　Students learn the introduction on the structure of a lander at "Mars Base 1 Camp" in Jinchang City of northwest China's Gansu Province on April 17, 2019. The simulated Mars base opened Wednesday in Gansu, aiming to popularize science and boost interest in space exploration. (Xinhua/Fan Peishen)

　　Aerial photo taken on April 17, 2019 shows a view of the simulated "Mars Base 1 Camp" in Jinchang City of northwest China's Gansu Province. The simulated Mars base opened Wednesday in Gansu, aiming to popularize science and boost interest in space exploration. (Xinhua/Fan Peishen)

　　Photo on April 17, 2019 shows the opening ceremony of the "Mars Base 1 Camp" in Jinchang City of northwest China's Gansu Province. The simulated Mars base opened Wednesday in Gansu, aiming to popularize science and boost interest in space exploration. (Xinhua/Fan Peishen)

　　A staff worker walks from the main control cabin of "Mars Base 1 Camp" in Jinchang City of northwest China's Gansu Province on April 17, 2019. The simulated Mars base opened Wednesday in Gansu, aiming to popularize science and boost interest in space exploration. (Xinhua/Fan Peishen)