BORN in 1966,Yu Fumin is tall,thin and looks older than his age.He and his wife live in one of the fields along the G40 Shaanxi-Shanghai Expressway.Their home is a small,dark,wooden shed,piled with sundry items,with hardly any room to stand.They grow green vegetables beside the house,and next to their greenhouse is a line of one-meter-tall walnut tree saplings.Their tiny dwelling is just 50 meters away from the noisy expressway, BORN in 1966, Yu Fumin is tall, thin and looks older than his age. He and his wife live in one of the fields along the G40 Shaanxi-Shanghai Expressway. Their home is a small, dark, wooden shed, piled with sundry items with hardly any room to stand. They grow green vegetables beside the house, and next to their greenhouse is a line of one-meter-tall walnut tree saplings.Their tiny dwelling is just 50 meters away from the noisy expressway,