Behind the steel doors of two bunkers in a Beijing suburb, university students are trying to find out how it feels to live in a space station on another planet.
Recycling everything from plant cuttings to urine, they are part of a project to create a self-sustaining ecosystem that provides everything humans need to survive.
Four students from Beijing University of Aeronautics and Astronautics entered the Lunar Palace-1 on Sunday with the aim of living self-sufficiently for 200 days.
They say they are happy to act as human guinea-pigs if it means getting closer to their dream of becoming astronauts.
Liu Hong, a professor at Beijing University of Aeronautics and Astronautics and the project's principal architect, said everything needed for human survival had been carefully calculated.
It remains to be seen whether the students can survive without their smartphones.Keywords: China, TECHNOLOGY