Here the paper piecing has been completed and trimmed to size. I've attached the centre square-in-a-square to the flying geese. I've also started working on the 1/2 square triangles for the next border and outer border.
Here the work continues on the middle 1/2 square triangles.
Here the middle 1/2 square triangles have been attached along with the middle strips. Can you see that what remains is a 9-patch?
And here is our completed block.