Yang Yi appeared at the new product launch conference in a blue bandeau feather slim dress, elegant and dignified Yang Yi appeared at the new product launch conference in a blue bandeau feather slim dress, elegant and dignified Yang Yi appeared at the new product launch conference in a blue bandeau feather slim dress, elegant and dignified Yang Yi appeared at the new product launch conference in a blue bandeau feather slim dress, elegant and dignified Yang Yi appeared at the new product launch conference in a blue bandeau feather slim dress, elegant and dignified Yang Yi appeared at the new product launch conference in a blue bandeau feather slim dress, elegant and dignified