About a month after a tiny piece of space debris stranded three astronauts for nine days aboard China’s Tiangong space station, the taikonauts aboard the orbital outpost have begun making some modifications. The countermeasure installation comes after the China Manned Space Agency pulled off an uncrewed emergency flight to Tiangong in under two weeks after the damage was discovered. Although the Shenzhou-20 space vehicle was meant to bring the previous crew back on November 5, cracks in the craft’s window caused by the space debris led to it being judged unsafe for the return voyage. Given that there are over 25,000 tracked pieces of space garbage floating about — and as many as 170 million bits that are too small to track — this combination could prove deadly for manned space missions. More on Tiangong space station: China Installs Oven in Space Station, Astronauts Use It to Enjoy Succulent Barbecue Feast