Bentleys and BMW convertibles roll up to the "Venetian Casino" in Mongla on the Myanmar-China border, a melting pot of sex, drugs and gambling on a frontier that has also become a "supermarket" for illegally traded wildlife.This area of Myanmar is largely self-governed – lying within the country's borders but playing by its own rules, nestled in the eastern range of mountains and cut off from the rest of the country.Instead, the region looks to China. The yua