Probably some Chinese massage that help you correct your bones. To be honest I've never seen such word as a Chinese lol. I searched it, it's also a direction like north and south in fengshui, which...doesn't make sense to say family Wu's north.. So it's 90℅ bone corrections.
The same as正骨. It does not looks like a clinic, and I doubt those people really have any kinds of licence. So it can't be those surgeons or dentists who use western medicine. They kinda... Use some massage methods to push your bones to the right place (assume you have a curved spine or luxated arm or some..disposition of your bones).
Lol you did Googled it... Misplacement and broken are two different concepts though. Like.. You can place the puzzle in the right place but once it's broken, you'll need a tape. Just... don't go to these places.. They never work, you can make your bones right by sitting and standing in the right position not by the "magical" hands of some old lady/guy..