Recently, we found aliens on this planet. They look like humans, but they have blue skin and six fingers in each hand. They have great strength, so they run very fast. They also have high technology, so they can help us solve some problems. If I can, I will ask them to help us clean the air, because the air pollution in China is very serious. I also hope that they can invent a new vehicle that produces less pollutants instead of cars. It is also important for us to have a healthy body, so I also want to ask them how to make our bodies stronger, so as to make us stronger.