Countless Chinese villages have been engulfed by modern cities. They no longer consist of picturesque farms and feng shui groves, but of high-rise buildings so close to each other that they create dark claustrophobic alleys--jammed with dripping air-conditioners, hanging clothes, caged balconies and bundles of buzzing electric wires, and crowned with a small strip of daylight, known as "thin line sky." At times, buildings stand so close to another...