In 1961, Soviet astronaut Gagarin suddenly felt urgency when he was about to step into the launch module, so he had to come down and urinate along the tube of the spacesuit; in the same year, American astronaut Shepard, who was unable to launch in the spacecraft, also encountered it. After urinating urgently, the commander ordered him to pee in the space suit.

In the 1980s, "the father of space suits" Chinese Tang Xinyuan improved the space suits to solve the urination problem of astronauts, added polymer absorbers, and invented diapers that can absorb 1,400 ml of water. Urine is no longer a problem for astronauts. . The technology was later transferred to civilian use, which is now the "diapers" used by thousands of households.