The ending of Mourning Our Lost Youth: Fifteen Years of Waiting for Migrating Birds was: At the end of the second movie, Sumi and Li Li finally got together and returned to Li Li's hometown to start a new life. At the beginning of the second movie, Su Mi and Li Li were separated because of a misunderstanding, but at the end of the second movie, they finally understood each other and came together. They had experienced many difficulties and challenges together, but they were always able to overcome them together. In the end, they realized their dreams and lived a happy life. The ending of " Mourning Our Lost Youth: Fifteen Years Waiting for the Migrating Birds " was very beautiful. It showed the growth of the protagonists and the process of pursuing happiness.