Shanghai, China: at around 25 million people living in the area, it is the world’s most populous city. At its epicenter, the Lujiazui skyline electrifies onlookers from across the Bund. The Oriental Pearl Tower shimmers alongside the China World Trade Center and other multi-million-dollar skyscrapers. The skyline is a “showpiece” of the booming economy of China, and wealthy businessmen leave the buildings in droves to take their luxury cars home. Their horns honk ceaselessly in the nightly traffic jam, which is mixed with the noise outside the vehicles of vendors shouting deals, shops blaring pop music and the odd drunk shouting at a taxi, but the people have become accustomed to such urban noise. Like any city of its size, there is an underbelly with an undercurrent or art flowing through...