Design specification The migration barriers in reality may be the obstacle of the household registration system, may be under various unequal factors and barriers between countries. Based on this, it is difficult for us to migrate freely. The picture shows the houses and birds in geometric form, The bars around us are like cages that trap the house and keep the birds away, Birds are like migrating refugees, and houses represent the countries that hold them, Behind it is the smoke of the air, the broken Homeless, like the homes of refugees Be destroyed and homeless. They longed for a safe and warm home, but they met them Cruel weapons and cold bullets.