Which of the following elements do the patterns on the gold staff unearthed from the Sanxingdui site contain?

Birds, fish, arrows.

1. Birds: The bird pattern on the gold staff unearthed from the Sanxingdui site is two opposite birds, with hooked beaks, big heads, raised heads, and erect tails, as if they are flying with wings spread.

2. Fish: The pattern is of two fish facing each other. The fish body is slender and has scales. The fins, tail and gills are all clearly carved.

3. Arrow: The pattern is an arrow, the arrow is deeply concave, the tail is wide, and the tail end is sharp.