To tell the truth, this design is a little funny. This design has also changed many versions. This version is to make the infusion set into the form of a secondary rocket. You heard it right. Ha, ha, ha, ha, ha, a little ridiculous. His structure or landing is whimsical and idiotic. In short, if you want to go to the toilet, you will tear down the first stage of the rocket and take him to the toilet. When you come back, you will install it for him and laugh to death. Everyone will be happy. I may be a little seriously ill.