China’s gleaming new skyscrapers have magnetic appeal for Western photographers, who often portray them as striking signs of the country’s massive growth. Michael Wolf is one such photographer, having trained his lens on Hong Kong since 2003, when he began “Architecture of Density,” his ongoing series of pictures depicting seemingly endless vertical columns and staggered grids of windows. The facades are shown at a distance, the thousands of people held within the matrices only suggested. For a related series, “100 x 100,” 2006, however, he photographed Hong Kong residents inside their nearly