The poster theme is RIGHT. The poster body is made up of many circles of different sizes, representing each person.The small circle comes from thinking about the number 0, which by definition means nothing .It shows that people on the same planet should have no discrimination, no inequality, and everyone should be equal and friendly to each other. A closer look at the poster suggests that 0 equal to 0, which means that the two objects are equal.But if you look at the picture from a distance, it shows that 0 does not equal to 0, so two identical objects are not equal. It shows that we should think seriously and do what is really meaningful for human development, instead of being deceived by some false appearances.