Zhongxin Kaiwei Modern Farming in central China's Hubei province is raising pigs in a 26-story building with advanced technologies and a central control system. They will have 20,000 breeding pigs and they can output 600,000- 1.2 million pigs per year. It is in the city of Enzou about 500 miles west of Shanghai. It is a $500 million facility with 800,000 square metres of space. Pigs stay on each floor throughout their lives and the air system contains any disease outbreak to one floor.