That summer, a bicycle carried a boy from a fishing village and his daughter, an educated youth, through the sunset. Two unsent letters and a blank postcard made them drift in the tide of the times for thirty years. From the dock to Shenzhen, from the lighthouse to the podium, they passed through each other's lives, and finally reunited in their hometown - not a reconciliation, but a reconciliation. Life is not repeated, but the lighthouse is lit.