Above all, work the situations over. Never be satisfied with your first view of a place or the first frame you snap. It's always possible—and usually likely—that you can come up with something better. Why else would painters make sketches? Get closer, then get closer still. Try different angles, different lenses. Wait for the light, wait for the crowd, wait for a bird to land on the tree branch. Never be in a hurry to get somewhere else. Tell yourself that nothing is more important than getting the best you can get out of the situation you are in. Once you've exhausted every possibility you can think of, you can start working on the next one.
My still-embryonic idea is to enlist the help of a local acquaintance who would wear a cheongsam (aka qi pao), and take the role of a sing-song girl. The photo shoot would take place in the streets of Yau Ma Tei, and in the parlor itself. Whether the parlor would allow it or not is an open question that will be answered when I'm there. The owners and clients seemed very laid back when I made these photographs.