One day， the Pipi monster arrives on Earth. It is a big and strong alien（外星人）. It attacks people on Earth. The world needs a hero robot to save earth. Who can invent the robot？
　　McDull always dreams to be an inventor（发明家）. Can a little pig build a big robot and save Earth？ Some people laugh at him. But his mum and the schoolmaster（校長） help him. McDull finally builds Rizo —— a big rice cooker（电饭煲） robot. Everyone is waiting for the fight between the Pipi monster and Rizo.
　　But someone is making a big secret plan. Can McDull and Rizo be heroes？ Let’s find the answer in the movie.
　　McDull
　　McDull is a little pig. He lives in a fishing village in Hong Kong. He is a kind and happy child.
　　The Pipi Monster
　　It is a big alien. It is not afraid of bombs. The human army（军队）cannot do anything to it. And it stinks（发出臭气），too.
　　Rizo
　　It is a big robot. It looks like a rice cooker. McDull and the schoolmaster build it together. Its weapons（武器）are rice balls.
　　Mrs Mak
　　She is McDull’s mum. She always believes in McDull. She works day and night（夜以继日）for money. McDull needs money to build Rizo.
　　Old streets老街区
　　In Hong Kong， there are lots of small shops on old streets. You can see many big billboards（广告牌）， too.
　　Street food街边小吃
　　Street food in Hong Kong has a long history. There are many kinds of it. The fish ball is McDull’s favorite.
　　Asian Games亚运会
　　In 2000， many Asian countries bid for（申办）the 2006 Asian Games（亚运会）. Hong Kong was one of them. Everyone here was excited.