Along with the greetings of memories and longing, the little girl held the friendship across the two ends of the earth and sent a heartfelt package, and a "big surprise!" "Dear Lulu, long time no see: Last summer, you lent me I have read that story book many times. I don't know when we will meet again, so I sent a package to return it to you..." This package sent to Lulu accidentally contained a " Surprise"! The round eyes in the hole of the box followed the package from the post office to the airport, passing through the rainbow after the rain and the night sky, and finally arrived at the package.