Yang Peng's alien series original science fiction works. The book continues Yang Peng's consistent style of creation—incredible imagination, extraordinary exaggeration, unrepeatable comedy, bizarre plots, sci-fi elements, relaxing, humorous, and thrilling fun. At the same time, courage, integrity, kindness, unity, patriotism, and environmental protection are integrated into the delightful storytelling. The theme is positive, setting a good example for the children.

A hundred years later, a massive earthquake broke the box of the imprisoned aliens, and the aliens escaped! They raided the Antarctic research station and ransacked the Golden State to worship the Golden City, making a large number of vicious incidents. Their next goal is the country that the children have built—the brave city of the capital of Papa, and a new battle is about to start. Can the young heroes of Papa State resist the invasion of aliens and save the earth?