Old Shanghai Sourcebook

Publisher's blurb:

Old Shanghai, "The Gateway to China", "Paris of the East" and "Pearl of the Orient". In the thirties, Shanghai had many names. It was a city where politics, business and crime whirled with a glitzy nightlife full of Jazz, creating a dark but sparkling metropolis. Old Shanghai is a resource provided to bring Old Shanghai into your favorite game.
...
Take your players on a tour through magnificent dance halls, buddhist temples and British clubs, getting entangled with Green Gang gangsters, poverty stricken White Russians and utterly corrupt colonial policemen.