Hai Si is a farmer's child, he is very envy when he saw his friend Da Zhi's family portrait taken in Expo.His mother out-migration for work for a long time, he asked his father to take him to the Expo's Taiwan Pavilion to make a wish lantern to his mother, but his father do not understand, refuse to do it, so he angrily set foot on the Expo trip alone.—Shanghai Creasun Media