Who can find the fish in the story of three white cranes and why?

In the story of three cranes, the third crane can find fish. Because the targets under the sun and white clouds are not specific, only the targets under the willows by the river are specific and accurate. The first crane remembers to bury the big fish in the sun, the second crane remembers to bury the big fish under the white clouds, and the third crane remembers to bury the big fish beside the willow tree. The next day, the first crane flew to the sun, the second crane flew to Bai Yunfei, and the third crane flew to the willow tree.

One noon, three white cranes caught many fish in the river. When they are full, they bury the remaining big fish in the ground and save them for tomorrow. The first crane looked up at the sun and remembered that the big fish was buried in the sun. The second crane looked up at the sky and remembered that the big fish was buried under the white clouds. The third crane looked at the willow by the river and remembered that the big fish was buried next to the willow. The next day, the sun just rose and all three white cranes woke up. The first crane flies to the sun. The second crane goes to Bai Yunfei. The third crane flew to the river and landed beside the willow tree.