Almost everything can be mixed for him. But if we don't have our own space station, it depends on the faces of others. What do you want to bring up, and what do you want to do after you get up?
It must be approved by others, and only when they agree to you can you bring it up, and then you can go up and synthesize it. This is still under the circumstances that others are willing to take you to play. In fact, they didn't take us to play at all.
We don't even have the opportunity to be made difficult by others, and you never have the opportunity to do such an experiment. The results of other people's experiments will not be shared with you. But now it’s different. We have our own spacecraft and our own space station.
I bring up whatever I want. After I went up, I thought about how to mix, how to mix, no one can care about it. And the results of my experiment will certainly not be shared with you.
There are many, many things that can be done in space. For example, on the ground, because of the influence of gravity, it is difficult for us to machine particularly round circular parts. For example, the balls in the bearing.