On February 4, 1993, Russian astronauts successfully conducted the first human experiment on the "Peace" orbiting station, using a spacecraft (also known as a solar umbrella) to reflect sunlight to parts of the Earth. At 3:45 in the morning, the "Progress" spacecraft carrying a spacecraft left the "Peace" orbiting station. When the spacecraft flew to more than 350 kilometers of altitude, the spacecraft made of aluminum plastic film was fixed on the reel of the spacecraft head. Under the action of the heart, the spacecraft gradually opened, forming a reflection disc with a diameter of 20 meters. The spacecraft flew around the Earth, reflecting sunlight to the region of Europe at the time in the extreme darkness, and