The Miracle of the Grey Swans:

A beautiful story about a deep friendship between a little boy and a family of swans. With the help of Weiwei and his family, injured mother swan gets better and successfully hatches her baby swans. When spring arrives again and father swan returns, they are happy to be together again. Weiwei is sad when they migrate to the south in winter, but he truly believes that they will return to him the following year.