The thousandth paper crane... was a promise they once made. Through countless meetings and partings, they talked, walked, and dined together. Unbeknownst to them, the paper cranes reached their thousandth fold. He and Qian took a train to the beach. When He proposed with a bouquet, Qian chose to leave him. A year later, He returned to that beach on Qian's anniversary of death. He looked at the paper cranes and remembered their promise of a thousand paper cranes.